Robbie Mustoe believes that Kai Havertz may have actually had his best game for Arsenal on Tuesday in their win over Luton, suggesting that he may now be finding a groove with the Gunners. Mustoe was speaking on The 2 Robbies podcast after Mikel Arteta’s side briefly extended their lead at the top of the Premier League table, with Declan Rice scoring a 97th minute winner at Kenilworth Road. Kai Havertz was one of those who scored for the Gunners against the Hatters. The Germany international capitalised on a good piece of work from Gabriel Jesus to make the score 3-3 in the second-half. Kai Ha…