Chelsea don't need to enter the transfer market with any sense of desperation in the summer after passing their biggest test left in their bid to re-gain the Premier League title, after beating Everton 3-0 at Goodison Park.
Romelu Lukaku is valued at £100 million by Everton, as he looks for a move away to a bigger club in the summer, but he failed his audition in front of Antonio Conte and the money men at Chelsea.
Pedro provided a moment of brilliance in a dull game up until that point. The Blues ended up dominating in Merseyside to heap pressure on Tottenham Hotspur ahead of their final North London derby at White Hart Lane. The toughest test has been passed and the title is so, so close.
Chelsea's players have delivered an incredible week for their fans with two league wins over Everton and Southampton and an FA Cup semi-final win against Tottenham. They scored 10 goals and finally got their first clean sheet in their last fourteen games.
After Pedro's strike, Gary Cahill added a second from a corner and his eighth goal of the season as Everton's shambolic defending was punished by the league leaders.
Costa was then involved for the third - as his pass for Chelsea's third goal got Cesc Fabregas in behind the Everton defence and he was able to get yet another assist as he combined with Willian.
In a world obsessed with the transfer market, Conte must ignore the noise and stick, rather than twist with a lot of his Chelsea stars. Lukaku is great and he would be a good addition to the squad but he is not worth re-signing for the fees that Ronald Koeman will demand and a huge fee would bring pressure with it.
Chelsea are a team and Pedro told his team-mates to keep their chins up after his stunning strike. The club's team spirit has been a huge factor in their comeback to greatness this season and big name signings will have to bed into a group that is already working well.
Paul Pogba has struggled to live up to his billing and Chelsea don't need to follow United or Real Madrid in signing marketable 'galacticos'. Costa failed to score on the day but out performed Lukaku on his own patch with decent all round play, while offering an outlet for his team.
When Lukaku misfired, he offers very little but when Costa does, he contributes far more. He works hard, gets on the ball and occupies defenders even on his bad days.
Chelsea's match going fans still chanted for Costa, throughout his recent seven game goal drought and there is appreciation for his efforts, even if they sometimes get him into trouble. It was the run without goals of his career, in which he produced some of his worst performances but his actions earlier in the season must not be forgotten.
Lukaku remains the Premier League's top scorer and he a better finisher than Costa but Conte will be questioning whether the Everton striker can do it in the biggest games. He's only got three of his goals versus the top six, while he has 17 against the bottom 10.
Enner Valencia out shined Lukaku on this particular day and his five shots did little to cause Chelsea concern. Chelsea's stars looked set for the scrap heap last season as they finished tenth under Jose Mourinho and Guus Hiddink but the group have pulled together brilliantly under new leadership.
Conte repeatedly repeats the mantra that any transfer stories are "disrespectful to my players" and he is right. The current group of Chelsea players must be appreciated for their incredible achievements and performances. Everton fans will certainly look on in envy as Willian's goal made it 8-0 on aggregate against the west London club this season.
Conte has proven he is a genius and his players have proved that they are anything but finished. Everyone at Chelsea; from the fans, to the manager, to the players must stick together for the brightest future as they embark on European adventures next season.