'People say Redknapp's a wheeler-dealer and it's so disrespectful, ' Merson said on Sky's A League Of Their Own.
"Tactically, he's one of the best I've worked with".
Merson played under both men during his playing career, but believes the English manager is a far more accomplished tactician than Wenger.
Social media was quick to respond with laughter and bemusement at Merson's comparison of three-time Premier League and seven-time FA Cup victor Wenger with Harry Redknapp. The north London club have not won the title in 13 years, with their last triumph coming as early as in 2003/04 when they went an entire season undefeated.
Redknapp was sacked by Birmingham City last month as the team struggled at the wrong end of the Championship table. We were 2-0 down at half-time and it could've been 10-0.
"I think top four is an achievement now, certainly for Tottenham, Liverpool, Arsenal".
Merson won the First Division title under Redknapp at Portsmouth and the former midfielder reveals how his ex-manager was so instrumental in their success.
'That's when I knew he was a great manager'.
Merson's role as a pundit on Sky Sports has left fans with many moments of laughter and confusion with his bold and audacious opinions.