According to Spanish outlet Cadena Ser, via Daily Mail, Barcelona's sporting director Robert Fernandez was in attendance of Bayern Munich's Champions League drubbing of Arsenal at the Allianz Arena to watch Thiago Alcantara.
The illusive Spaniard scored two emphatic goals in Bayern's 5-1 humbling of Arsene Wenger's wounded Premier League outfit, now it's been rumoured that the Catalan giants are keen on swooping Thiago, four years after they sold the entertaining play-maker.
Catalan paper El Mundo Deportivo have also claimed that Barca scouts were also keeping tabs on Thiago during the first leg of Bayern's 10-2 rout of the Gunners in the Champions League at the Emirates - an occasion which Thiago managed to notch a brace in another 5-1 victory for Carlo Ancelotti's dominant squad.
Pep Guardiola snapped up the Spanish international during his spell at the German giants for just £15m. Thiago failed to perform in 60 percent of Barca's matches prior to his sale, meaning he could be bought at a discount price.
The 25-year-old is contracted to the Bundesliga champions until 2019, however his brother Rafinha currently administers his trade at Barcelona, and linking up with his just as talented sibling could be one of many defining factors in his potentially sensational switch back to Spain.
Premier League titans Arsenal and Manchester City are also said to have raised an interest in Bayern's clinical attacking midfielder, with his exploits being envied by various potential suitors across the majority of Europe's elite divisions.
Wherever Bayern's number 14's future resides, there's sure to be a hotly-contested tug-of-war for his dazzling services once the transfer window opens again.