Ryan Giggs has hinted he would consider leaving Manchester United to play or to become a manager of another club "somewhere else", though the Welshman insisted any decision over his future will come at the close of the campaign. Louis van Gaal is the favourite to become the permanent United No1, with the Holland manager hopeful of being appointed before 7 May when he begins official preparations for the summer's World Cup.

Asked if Giggs would want to be No2 to Van Gaal or any new manager, the 40-year-old said: "I have got to decide if I want to play or not so there is no point thinking if I want to be an assistant or if I want to be a manager somewhere else. There are so many things to think about. The way I am thinking is I am enjoying it and then my concentration is on the remaining two games and then like I have just said, we will see what happens at the end of the season."

Giggs insisted he is just getting on with being the interim manager, with the Welshman having spent the week discussing youth player contracts and the club's summer tour. "Nothing has changed – it's until the end of the season. We'll chat when that's over," he said. "I've got a lot to think about, whether to carry on playing. But my concentration is just on now. The only peace and quiet you do get is when you are on the training pitch. As soon as you are back in the office, you have meetings, you have calls.

"For example this week has been planning pre-season, which has been testing because we have to way and see about the Europa League and the third qualifying round for that is round about the tour time, so different permutations. Also it is a difficult time for young players, extending contracts, renewing contracts, loan players, players that need to come back, players that need their future sorting out so there has been a lot of that this week."

Wayne Rooney is a doubt to face Sunderland as he has a stomach bug and "tight groin", with the other players in the United camp, including Anders Lindegaard, also suffering from the digestive complaint. Giggs said: "He has a bug and a tight groin too. But Wayne being Wayne, he wants to play."

Robin van Persie, who has not played since 19 March because of a knee injury, could be in contention for Saturday's match. "Robin's looked good in training. Whether tomorrow is too early, we'll just see how he goes today," said Giggs.