Jose Mourinho has described Romelu Lukaku as 'untouchable', such has been his happiness with his big-money summer investment.

Lukaku's goals in the early part of the season and his work-rate during his recent goal slump have left a major impression on Mourinho, who has bet big on the former Everton man.

Lukaku is proving himself vital to Mourinho's Manchester United and in the early throes of his Old Trafford career, the Belgium striker is looking to maximise his value off the pitch also.

In attempting to do so, in his quest for a big-money boot deal, Lukaku has been playing sportswear giants Nike and Adidas off against one another.