Tottenham Hotspur secured maximum points after finishing the game 1-0 winners, however, the sole goal of the 90 minutes came in the 65th, after Emmanuel Adeyor reacted to a swiftly-taken free-kick to net against Evertonian shot-stopper Tim Howard.
Keys, though, believes the match referee - Mark Clattenburg - should have reordered the taking of the dead-ball situation as the initial attempt violated law 13.
'Mark Clattenburg should've ordered a re-take,' continued Keys. 'The ball was some ten yards from the original offence when Walker took the kick.
'Full marks to him - black mark to Gareth Barry for giving the ball up so easily. But law 13 states the kick should be taken from the place of the offence. Spurs got a distinct advantage because it wasn't.'
The result could have consequences on the final rankings come the end of the season as, with the three point victory, Tottenham moved into fifth place, two points clear of Everton in sixth and three behind Liverpool in fourth.
There are 39 points remaining in the fixture list for each club to play for.
image: © wonker