Kevin Campbell has backed Arsenal to beat Liverpool in the FA Cup third round on Sunday. The Gunners have endured a tough patch of form in recent weeks, having picked up just one point from their last three Premier League games. Mikel Arteta’s men led the way on Christmas Day but have since slipped down to fourth, with Liverpool now sitting top of the table. Both Arteta and Jurgen Klopp have lifted the FA Cup in recent years, with Arsenal winning the competition in 2020 and Liverpool lifting the trophy in 2022. Of course, both will be keen to replicate that success this term, as well as compet…