The Japan international headed into the counter with a 100% record against the Bavarian giants, having won all four of the games he had featured in against them during his time at Borussia Dortmund.
The 25-year-old was left on the bench for the first leg of the quarter-final tie and perhaps manager David Moyes would not have brought him on until the middle of the second half. Or maybe not at all.
Yet, he was scampering on the pitch at the start of the second half, thanks to an injury suffered by winger Ryan Giggs.
Kagawa’s introduction gave United more impetus and made them a lot more threatening than they had been in the first half. The midfielder may have failed to win over fans and critics in the Premier League, but the Bayern players knew what he could do from his two years in the Bundesliga.
And Mark Bosnich knew as well. The 42-year-old former Manchester United goalkeeper believes that the former Cerezo Osaka star should be playing more in his favoured role down the middle, and that he is a quality player.
“It’s hard to understand why he’s been so overlooked,” he told talkSPORT. “Every time he’s come into play he’s been outstanding.
“He’s someone who you can give the ball to in any situation, especially when you’re up against it. He can do little tight turns and passes the ball very well.”
Kagawa arrived in the Premier League with big promise and hype in the summer of 2012, but has often been played out of position on the wide.
The attack-minded player made 20 appearances in the Premier League under Sir Alex Ferguson last season as United won the title and just three in the Champions League.
This term he has failed to earn Moyes’ faith and has been able to feature in just 13 league fixtures, although he has started five games in Europe.
Kagawa is a very, very promising player and his performances and record in the Bundesliga show that. Moyes needs to have more faith in him and, perhaps more importantly, give him freedom in attack and not restrict him to the wing.