Juventus's hopes of reaching the Champions League quarter finals suffered a blow when the two-times European Cup winners suffered a 1-0 defeat in their last-16 first leg at Olympique Lyonnais on Wednesday.
Midfielder Lucas Tousart scored the only goal in the opening half to give Lyon, who are bidding to reach the quarter-finals for the first time since 2010, a deserved win.
Aouar then burst into the area and delivered a cutback that Tousart placed into the top corner from close range to put the French side ahead after 31 minutes.
Juve were at the time down to 10 men as Mathias De Ligt was getting treatment for blood on his head after being accidentally stamped on by team mate Alex Sandro.
It was Lyon's first victory over Juventus, who suffered their first defeat in the competition this season.
"We were not the favourites and rightfully so, but we believed that we could unsettle Juventus," said midfielder Aouar. "But let's not get carried away, there's one full game left."
Juventus have only won four of their last eight competitive matches and captain Leonardo Bonucci pointed out that the team had improved.
"We messed up our first half, sometimes it happens," he said. "We gifted one half and they scored at a moment when they were good at hurting us.
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