Manchester United legend Wayne Rooney has issued a warning to Viktor Gyokeres after his subdued Arsenal debut. Gyokeres struggled to make an impact in Arsenal’s Premier League opener at Old Trafford on Sunday and was replaced in the second half by Kai Havertz.

Speaking to Sports Mole, Watts claimed that Arsenal's fellow attackers did Gyokeres no favours with their runs inside, but he also implored the Scandinavian to quickly adjust to life in the Premier League, where he cannot "bully" defences in the same way that he did in the Primeira Liga.

Arsenal defied a largely below-par performance to beat Manchester United 1-0 at Old Trafford and make a winning start to their Premier League campaign. The Gunners were not at their best in defence or attack, but a Riccardo Calafiori header from a corner proved enough to earn them three points.