Paul Pogba has re-opened the uncertainty over his future at Manchester United after saying a “question mark remains”.

Premier League: 10 talking points from the weekend’s action | Guardian sport Read more

The midfielder was pivotal in Sunday’s 4-0 rout of Chelsea at Old Trafford, his display including a 70-yard pass for Marcus Rashford’s second-half goal. Yet, having stated in the summer it was time for a new “challenge”, Pogba suggested he could still leave the club.

“Obviously there have been things said but only time will tell,” said the 26-year-old. “This question mark remains. However, as I said, I am here in Manchester. I enjoy playing with my teammates and I always want to win every game. I always give it everything. I am always good whenever I play football. It is what I love – it is my job. I give the maximum each time I am on a green pitch.”

Real Madrid would like to sign Pogba yet as the domestic window has closed it seems unlikely he could move to the club despite the Spanish market being open until 2 September as United would be unable to sign a suitable replacement.

The victory over Chelsea lifted United to second after the opening round of Premier League fixtures. Rashford also struck a first-half penalty before Anthony Martial and Daniel James, on his debut, completed the scoring.

Pogba said: “In the first half, we were dominated in terms of chances and possession, but we reacted in the second. Our changes enabled us to take over. We were better in possession and in terms of chances. We were lucky to have the lead through the penalty in the first half, but after a bad start, we finished the match well. We are satisfied with our performance.”

The Dozen: the weekend’s best Premier League photos Read more

Pogba operated in a deeper lying role – and enjoyed it. “That has been there for a while now – since before this season,” he said. “In terms of organisation, it is a bit more like how I play with the French national team. It does not bother me where I play, whether it is higher or lower, we adapt and enjoy. The team too, we were much better coming out of the back and that is something to keep going with in the coming games.”

Aaron Wan-Bissaka and Harry Maguire made full debuts and impressed. Pogba said of Maguire: “I call him ‘the Beast’ – honestly, as you saw, he was really impressive. He is a leader. He fit right in with us in training. We talked about controlling the defence well and he has a good understanding with Victor [Lindelöf]. It was a very good match to start with from the whole team.”

Of the goal he created for Rashford, Pogba said: “Rashy and I understand each other well. We try to do a maximum number of passes like that. I am starting to understand his calls for the ball too and that enables me to find him like I did.”