Jose Mourinho: Manchester United fans were amazing

The 24-year-old striker continued his fine start to life at United at St Mary's on Saturday afternoon, when his first-half effort was enough to secure a hard-fought Premier League win.

Lukaku has quickly become a fans' favourite, although a song to the tune of the Stone Roses' 'Made of Stone' has caused controversy as it references the size of his penis - a song anti-discrimination body Kick It Out have called "offensive and discriminatory".

United manager Jose Mourinho was not keen to discuss the subject before the trip to Southampton and after the game was asked about the subject again.

"I don't understand what the fans sing," he said.

"The only music I understand clearly is one from my opponents when they tell Mourinho to go to a place. That's the only one I understand.

"But the only thing I will say is the fans were amazing, the support amazing from the first to the last minute.

"It's important to have that not when you're winning 3-0 or 4-0 and winning the game, but it's more important when you are defending and are exhausted. The songs? I don't understand them.