Former Arsenal star Theo Walcott has urged his old club to sign Aston Villa striker Ollie Watkins this summer. Walcott likened the England international to Arsenal legend Thierry Henry. Arsenal have been linked with a new striker this summer to bolster Mikel Arteta’s attacking options. Speaking about Arsenal’s plans for the summer, Walcott told Premier League Productions: “Well, you look at their goals tally right now. They will probably invest in a striker and that player could well have been playing on the opposite side [at the weekend]. Asked if he was referencing Watkins, Walcott responded…