Bayer Leverkusen coach Peter Bosz insists he has no concerns over Kai Havertz's commitment levels, vowing the Chelsea target will be the first name down on his team sheet to face Rangers.
The Germany winger is reported to be close to a £70m switch to Stamford Bridge.
But Bosz does not believe the 21-year-old will have his mind in London when his current employers reacquaint themselves with their Europa League rivals from Glasgow after a five-month break.
Havertz scored the opener from the spot at Ibrox as Leverkusen claimed a 3-1 first-leg lead and are now looking to finish the job at the BayArena this evening.
"I will answer these questions very shortly," said Bosz at a press conference. "Yes, he will play and yes I'm convinced he's 100% still fighting for Leverkusen."
While Havertz is available, Dutchman Bosz has been hit with a selection dilemma ahead of the last-16 return clash.
Paulinho will miss out after rupturing his cruciate ligament and Dutch winger Karim Bellarabi is struggling with a muscle problem.
Midfielder Nadiem Amiri is also out of the showdown with Steven Gerrard's men having been placed in quarantine after coming into contact with a close friend who has since tested positive for coronavirus.
Bosz is taking nothing for granted, saying: "I don't think it's a formality. Winning at Ibrox 3-1 was a great result, but it won't be easy at all. Just look at the preparations Rangers have doing.
"They kept clean sheets throughout all their pre-season friendlies so it won't be an easy match at all."