'Lukaku cannot be considered world-class yet'

Romelu Lukaku has got his Manchester United career of to a brilliant start, with 4 goals in his first 4 league games, but Paul Ince believes the Champions League is where he will be really tested. 

Although the 24-year-old has played at a top level with Belgium and in Europe with Everton, he is still yet to make his Champions League debut and Ince believes the competition can help him "define his career".

"It is highly unusual these days for a £75million striker not to have had previous experience and, if he wants to be considered world-class, this is the stage where he has to prove himself," Ince told the Daily Mail.

Ince was full of praise for United's summer-signing from Everton but also suggested there are areas of his game which he needs to improve to make a mark on Europe's top competition. 

"Lukaku is a goalscoring machine and would cause problems to any defence in the world because of the way he runs at people and keeps his composure in the penalty area.

"On the other hand, his retention of the ball is not fantastic and, if he goes chasing the ball to get involved in the build-up, United could get punished because top Champions League teams exploit opponents who have lost their shape."

The former United man also believes that Mourinho's side have the best chance out of the five English teams in the Champions League to get to the latter stages of the competition.

"People will accuse me of bias but I genuinely feel my former club United represent the Premier League's best chance of getting to the quarter-finals and beyond.

Jose Mourinho knows how to win and will be going for the throat."

Lukaku will get his first taste of Champions League football when Basel visit Old Trafford on Tuesday night, and the striker will hope to make an impact when United face their other group opponents CSKA Moscow and Benfica at a later stage.