Gyokeres penalty sends scrappy Arsenal top with win at Everton

Jake O'Brien's handball gifted Arsenal the penalty which won the game

Arsenal's Viktor Gyokeres scored his seventh goal for the club since his move from Sporting Lisbon. Pic: Peter Byrne/PA Wire.

Premier League: Everton 0 Arsenal 1 

Viktor Gyokeres' first-half penalty ensured Arsenal will spend Christmas at the top of the Premier League, but this was hardly a performance of champions.