Bayer Leverkusen are through to the Europa League quarter-final and that could have an impact on the Kai Havertz to Chelsea transfer.
Leading 3-1 from the first-leg against Rangers in their round of 16 tie, the Bundesliga outfit finished the job at the BayArena on Thursday evening with Moussa Diably netting the only goal of the second leg.
It means Leverkusen will face Serie A giants Inter Milan on Monday.
As a result, the Blues may have to wait until Leverkusen are knocked out of the competition to seal a £90m deal for Havertz - who was in the starting line-up against Rangers.
In fact, Leverkusen chief Rudi Voller has recently revealed that the Germany international won't be leaving until the Europa League campaign has concluded.
"Maybe I'm too old-fashioned or romantic but for me it is a matter of course that a player ends the season no matter when it ends," he told reporters. "There is no discussion at all for me to consider.
"Could I possibly hurt myself? Or take a little vacation? Then some should have withdrawn two months ago.
"Whether it's the Europa League or the Champions League, if it's wanted by the player, the host and the club, I couldn't understand if a player didn't want to [play]."
Should Leverkusen get past Inter and go all the way, the Europa League final is on August 21, so Chelsea may have to wait at least another fortnight before confirming the Havertz transfer.
Speaking ahead of the game against the Gers, Leverkusen boss Peter Bosz insisted that Havertz can handle constant attention regarding his future.
"We are watching all this closely," Bosz told DAZN and Goal. "Of 20 interview requests 18 want to speak with Kai. Then we must make sure he doesn't go 18 times.
"He is an exceptional player, but even exceptional players can have a bad day. If we lose, he is always the first to be criticized, even if he didn't play that badly.
"I often talk to him and explain how I saw his game. Then there are games like the one against Hertha Berlin, when the fans whistled at his substitution.
"I told him that maybe he learned the most in that game, where he was really not good.
"But Kai is an intelligent boy overall and knows how the world works."
