Inter Milan fell short of advancing to the quarterfinals of the competition despite recording a 1-0 win at Anfield, having lost the first leg 2-0 at their own backyard.
Inter's hopes of progressing was made even harder moments after taking the lead through Lautaro Martinez in the 62nd minute when Alexis Sanchez was sent off for a second bookable offence.
Sanchez's follow through after winning the ball caught Fabinho and the Brazilian's reaction could have convinced the referee in producing a second yellow card.
Wenger has opined that his former player at Arsenal was unlucky to be sent off, insisting that Fabinho made the most of the challenge.
"Borderline between cheating and being clever," Wenger said on beIN SPORTS after the game.
"Fabinho, on this foul, was on the other side… he was cheating, he made more of it.
"Maybe he had pain but… he was touched by Sanchez, it wasn’t completely fake. Maybe he could have got up quicker.
"It was one of those fouls, if it was your player you say ‘it’s clever,’ when you’re completely neutral you say ‘he could have made less out of it.’
"He touched him but he didn’t want to hurt him, he touched the ball first."
