Rio Ferdinand jokingly reprimanded Martin Keown for being 'out of order' after the Arsenal legend told his old team to make the 41-year-old 'want to retire'.
The veteran defender continued his remarkable career by starting Porto's Champions League round of 16 clash against Arsenal on Tuesday evening as the visitor's seek to cause an upset in London.
Pepe is the fifth-oldest player to ever feature in the Champions League and has played an integral part in Porto's domestic and European campaigns this season.
However, Keown believes Arsenal's youthful team should look to exploit the legendary centre-back and demanded Mikel Arteta's side attack the defender at the Emirates.