By Jacob Leeks Arsenal are looking to keep the heat on Premier League leaders Liverpool when they travel to struggling Burnley on Saturday. The Gunners are two points adrift of Jurgen Klopp’s side, who will make the trip to Brentford hours after Arsenal’s game. As they prepare to take on the Clarets though, club legend Thierry Henry has warned boss Mikel Arteta he still has not fixed his side’s issues up-front. Arteta has again been criticised for failing to boost his options up-front, even though his side have scored the third-most goals in the top-flight. Henry’s warning comes as Rio Ferdina…