Manchester United are making another new signing after apparently beating off a host of competition abroad to land one of the top prospects in England. United are having a busy summer so far and have already signed players like Leny Yoro and Joshua Zirkzee. Right-back Noussair Mazraoui is also set to sign, while a deal to Matthijs de Ligt remains on their agenda. However, it is closer to home in the Premier League where United will be delighted with one piece of business. That piece of business comes in the form of signing now former Arsenal prospect, Chido Obi-Martin. The teenager made headli…