Former Chelsea star Pat Nevin was unimpressed with Mikel Arteta’s recent use of Arsenal player Kai Havertz. Kai Havertz was included in the Arsenal starting XI that took on Liverpool in an FA Cup clash on Sunday. The Gunners were knocked out of the domestic cup competition, falling to a 2-0 defeat against the Reds at the Emirates Stadium. However, it could have been a very different story had Havertz been more clinical in front of goal. The German had multiple chances to put the hosts ahead, but failed to find the back of the net. The 24-year-old was not alone in being guilty of wasting chance…