MANCHESTER UNITED legend Roy Keane revealed the toughest opponent he has ever played against throughout his glittering career.
Keane, 53, played against the greatest, meanest and baddest footballers in the history of the game.
Roy Keane speaking into a microphone, text overlay reads "Best Stadium".
Manchester United legend Roy Keane revealed his toughest ever opponentCredit: X/itvfootball
Roy Keane of Manchester United and Patrick Vieira of Arsenal clashing during a soccer match.
Keane had some unforgettable classhes with Arsenal legend Patrick VieiraCredit: Getty
Roy Keane of Manchester United clashing with Steven Gerrard of Liverpool during a soccer match.
Keane also collided with Liverpool icon Steven GerrardCredit: Getty
Zinedine Zidane of Real Madrid dribbling past Roy Keane of Manchester United.
But Zinedine Zidane stands out as Keane's hardest ever opponentCredit: Getty
The iconic midfielder's intense clashes with Arsenal hero Patrick Vieira are the stuff of legend.
The Republic of Ireland great also got to face Liverpool icon Steven Gerrard when he was coming up in the Premier League.
But the popular pundit ultimately went for a Ballon d'Or winner when choosing the best.
And that is none other than Zinedine Zidane.
Read More on Man Utd
Keane told ITV: "I'd probably say... Not gonna say Vieira, not Gerrard...
"Truthfully, Zidane would probably be the toughest opponent. Big, strong boy.
"Technically brilliant, very aggressive, scored on the big occassions.
"So Zidane would have been the toughest I've played against."
Most read in Football
Join SUN CLUB for the Man Utd Files every Thursdayplus
in-depth coverage and exclusivesfrom Old Trafford
Keane and Zidane, 52, collided in the middle of the park five times in the Champions League when the former played for Man Utd and the latter competed for Juventus as well as Real Madrid.
The hard Irishman won two of those encounters with a score of 3-2 at Juve in 1999 during United's Treble run and 4-3 at Old Trafford against Real in 2003.
Roy Keane shakes head and gives brutal side-eye at Ian Wright's antics live on ITV during FA Cup coverage
Zidane emerged victorious from another two with a score of 1-0 with the Bianconeri away in 1996 and 3-1 with Real at the Santiago Bernabeu in 2003.