Phil Jones was taken to hospital for an x-ray on a suspected dislocated shoulder that may threaten his participation in the World Cup with England, after a first-half collision with Maynor Figueroa in Manchester United's 3-1 win over Hull City.

With Roy Hodgson naming his 30-man preliminary squad on Monday, Jones faces an anxious wait to discover how serious the injury is. The initial scan proved inconclusive. The loss of the Jones would be a blow to England's manager because he offers valuable cover at right-back, centre-half and in central midfield.

Ryan Giggs, the interim United manager, stated that judging by Jones's reaction it had appeared a concern. "He has gone to hospital – we will just have to assess it and see how it goes but it didn't look great," said the 40-year-old. "Just by his reaction, he knew he had done something and he wanted to come off. Usually as a player you know that something is not great when you do that."

Asked about Jones's prospects of being available for selection for the World Cup, Giggs said: "I don't know. The reaction, he asked to be substituted straight away. Whether it is precaution [I don't know] but hopefully it is not too bad."

After two goals from the teenaged debutant James Wilson and Robin van Persie's late third for United, which were answered only by Matty Fryatt's consolation goal, Giggs was highly critical of Hull's David Meyler for his late second-half stamp on Adnan Januzaj. As the referee, Craig Pawson, did not take any action Meyler faces retrospective punishment that could result in a ban from Hull's FA Cup final with Arsenal on 17 May.

Giggs said: "I didn't see it but I have seen his leg. It is the second time it has happened to him this season and it's not great to see. It is terrible, his leg. He needs protecting. He is a brilliant player, he is exciting and the authorities need to stamp down on it but it was bad. It is a joke."

Did Januzaj need stitches? "No. It was just the length – it goes from his knee to his ankle," said Giggs, who brought himself on as a substitute for what may have been a final Old Trafford appearance.

Steve Bruce, the Hull manager, claimed he was unaware of the incident. "No, I didn't see it," he said. Pressed if Meyler may face action, Bruce said: "It's the first I have known now about it, I don't know what the TV has shown. I can't really comment because I haven't seen anything."

While Louis van Gaal is the favourite to become the new manager, the decision is yet to be confirmed but Giggs shrugged off any notion of there being a vacuum at the club. "I don't think it has changed in the last 10 days; it has not changed for me or for the players. You lot want to see something happen and I am just concentrating on doing my best I can for the club, whether it be on the pitch or off the pitch."

When might the situation be resolved? "I have not spoken to Ed [Woodward, the executive vice-chairman] for the last couple of days so nothing has changed since Saturday," said Giggs. "It could be the next few days, it could be the next couple of weeks."

Along with Rio Ferdinand and Patrice Evra, Giggs's future will be in the balance when the season ends. "For myself, it is pretty relaxed," he said. "I don't know if it is the same with Rio and Patrice, I expect it is. It is not as if they are young players and they are up in the air. If they carry on, they carry on, if they leave, they leave. New players are going to come in anyway, whether they stay [or not] so it is up in the air but in the next couple of weeks I think it will get sorted for the three of us."