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Cicero (L) of Brazil's Gremio celebrates with teammates after scoring against Argentina's Lanus, during their Copa Libertadores 2017 first leg final match, at Arena Gremio stadium in Porto Alegre, Brazil, on November 22

Cicero (L) of Brazil's Gremio celebrates with teammates after scoring against Argentina's Lanus, during their Copa Libertadores 2017 first leg final match, at Arena Gremio stadium in Porto Alegre, Brazil, on November 22

Cicero (L) of Brazil's Gremio celebrates with teammates after scoring against Argentina's Lanus, during their Copa Libertadores 2017 first leg final match, at Arena Gremio stadium in Porto Alegre, Brazil, on November 22 (AFP Photo/NELSON ALMEIDA)

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Fans of Gremio react at the end of the match. REUTERS/Edison Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Cicero of Gremio reacts after scoring. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Cicero of Gremio reacts after scoring. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Goalkeeper Marcelo Grohe of Gremio reacts after his team scored a goal. REUTERS/Edison Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Bruno Cortez (R) of Gremio and Alejandro Gonzalez of Lanus in action. REUTERS/Edison Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Lucas Barrios of Gremio and Rolando Guerreno of Lanus in action. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Luan (L) of Gremio and Maximiliano Velazquez of Lanus in action. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Arthur (L) of Gremio and Roman Martinez of Lanus in action. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Leo Gomes (R) of Gremio and Diego Braghieri of Lanus in action. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Ramiro (C) of Gremio and Rolando Guerreno (L) and Ivan Marcone of Lanus in action. REUTERS/Edison Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Walter Kannemann (R) and Arthur of Gremio in action with Jose Sand of Lanus. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Bruno Cortez (R) of Gremio and Alejandro Gonzalez of Lanus in action. REUTERS/Edison Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. Arthur Melo (L) of Gremio and Roman Martinez of Lanus in action. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Gremio v Lanus

Soccer Football - Copa Libertadores Final - Gremio v Lanus - Arena do Gremio, Porto Alegre, Brazil - November 22, 2017. A fan of Gremio cheers their team. REUTERS/Edison Vara

Soccer Football - Copa Libertadores Final - Lanus training

Soccer Football - Copa Libertadores Final - Lanus training - Arena do Gremio, Porto Alegre, Brazil - November 21, 2017. Lanus players attend a training session. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Lanus training

Soccer Football - Copa Libertadores Final - Lanus training - Arena do Gremio, Porto Alegre, Brazil - November 21, 2017. Marcelo Herrera of Lanus attends a training session. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Lanus training

Soccer Football - Copa Libertadores Final - Lanus training - Arena do Gremio, Porto Alegre, Brazil - November 21, 2017. Alejandro Silva of Lanus attends a training session. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Lanus training

Soccer Football - Copa Libertadores Final - Lanus training - Arena do Gremio, Porto Alegre, Brazil - November 21, 2017. Lanus players attend a training session. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Lanus training

Soccer Football - Copa Libertadores Final - Lanus training - Arena do Gremio, Porto Alegre, Brazil - November 21, 2017. Lanus head coach Jorge Almiron attends a training session. REUTERS/Diego Vara

Soccer Football - Copa Libertadores Final - Lanus training

Soccer Football - Copa Libertadores Final - Lanus training - Arena do Gremio, Porto Alegre, Brazil - November 21, 2017. Lanus head coach Jorge Almiron arrives. REUTERS/Diego Vara

Porto's forward Vincent Aboubakar (R) vies for the ball with Besiktas' defender Pepe (L) during the UEFA Champions League Group G football match November 21, 2017

Porto's forward Vincent Aboubakar (R) vies for the ball with Besiktas' defender Pepe (L) during the UEFA Champions League Group G football match November 21, 2017 (AFP Photo/OZAN KOSE)

Copa Libertadores Final - Gremio training

Soccer Football - Copa Libertadores Final - Gremio training - Arena do Gremio, Porto Alegre, Brazil - November 21, 2017. Jael of Gremio in action. REUTERS/Diego Vara

Copa Libertadores Final - Gremio training

Soccer Football - Copa Libertadores Final - Gremio training - Arena do Gremio, Porto Alegre, Brazil - November 21, 2017. Gremio head coach Renato Gaucho gestures. REUTERS/Diego Vara

Porto's Maxi Pereira (L) vies for the ball with Besiktas' Pepe (R) during the UEFA Champions League Group G football match November 21, 2017 at the Vodafone Park in Istanbul

Porto's Maxi Pereira (L) vies for the ball with Besiktas' Pepe (R) during the UEFA Champions League Group G football match November 21, 2017 at the Vodafone Park in Istanbul

Porto's Maxi Pereira (L) vies for the ball with Besiktas' Pepe (R) during the UEFA Champions League Group G football match November 21, 2017 at the Vodafone Park in Istanbul (AFP Photo/OZAN KOSE)

Porto's forward Vincent Aboubakar (C) vies for the ball with Besiktas' defender Pepe (L) and midfielder Atiba Hutchinson (R) during the UEFA Champions League Group G football match November 21, 2017

Porto's forward Vincent Aboubakar (C) vies for the ball with Besiktas' defender Pepe (L) and midfielder Atiba Hutchinson (R) during the UEFA Champions League Group G football match November 21, 2017 (AFP Photo/OZAN KOSE)

Champions League - Besiktas vs Porto

Soccer Football - Champions League - Besiktas vs Porto - Vodafone Arena, Istanbul, Turkey - November 21, 2017 Besiktas' Anderson Talisca celebrates scoring their first goal REUTERS/Murad Sezer

Champions League - Besiktas vs Porto

Soccer Football - Champions League - Besiktas vs Porto - Vodafone Arena, Istanbul, Turkey - November 21, 2017 Referee Antonio Mateu Lahoz REUTERS/Murad Sezer

Champions League - Besiktas vs Porto

Soccer Football - Champions League - Besiktas vs Porto - Vodafone Arena, Istanbul, Turkey - November 21, 2017 Besiktas' Cenk Tosun and team mates celebrate after the match REUTERS/Murad Sezer

Champions League - Besiktas vs Porto

Soccer Football - Champions League - Besiktas vs Porto - Vodafone Arena, Istanbul, Turkey - November 21, 2017 Besiktas players celebrate after the match REUTERS/Osman Orsal

Besiktas draws with Porto to reach Champions League last 16

Porto's Yacine Brahimi, front, and Besiktas' Ryan Babel, rear, challenge for the ball during the Champions League Groug G soccer match between Besiktas Istanbul and FC Porto in Istanbul, Turkey, Tuesday, Nov. 21, 2017. (AP Photo/Lefteris Pitarakis)

Besiktas draws with Porto to reach Champions League last 16

Besiktas coach Senol Guenes attends the Champions League Groug G soccer match between Besiktas Istanbul and FC Porto in Istanbul, Turkey, Tuesday, Nov. 21, 2017. (AP Photo/Lefteris Pitarakis)

Besiktas draws with Porto to reach Champions League last 16

Besiktas' scorer Talisca, right, and his teammate celebrate their side's first goal during the Champions League Groug G soccer match between Besiktas Istanbul and FC Porto in Istanbul, Turkey, Tuesday, Nov. 21, 2017. (AP Photo/Lefteris Pitarakis)

Besiktas draws with Porto to reach Champions League last 16

Porto coach Sergio Conceicao attends the Champions League Groug G soccer match between Besiktas Istanbul and FC Porto in Istanbul, Turkey, Tuesday, Nov. 21, 2017. (AP Photo/Lefteris Pitarakis)

Besiktas draws with Porto to reach Champions League last 16

Porto's Ricardo Pereira, left, and Besiktas' Talisca, right, challenge for the ball during the Champions League Groug G soccer match between Besiktas Istanbul and FC Porto in Istanbul, Turkey, Tuesday, Nov. 21, 2017. (AP Photo/Lefteris Pitarakis)

Champions League - Besiktas vs Porto

Soccer Football - Champions League - Besiktas vs Porto - Vodafone Arena, Istanbul, Turkey - November 21, 2017 Porto coach Sergio Conceicao and Ivan Marcano shake hands after the match REUTERS/Osman Orsal

Champions League - Besiktas vs Porto

Soccer Football - Champions League - Besiktas vs Porto - Vodafone Arena, Istanbul, Turkey - November 21, 2017 Besiktas coach Senol Gunes celebrates after the match REUTERS/Osman Orsal

Champions League - Besiktas vs Porto

Soccer Football - Champions League - Besiktas vs Porto - Vodafone Arena, Istanbul, Turkey - November 21, 2017 Besiktas' Pepe, Adriano, Anderson Talisca and team mates celebrate after the match REUTERS/Osman Orsal

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