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Roberto De Zerbi admitted he is worried about Brighton’s growing injury problems after they took control of their Europa League destiny with a commanding 2-0 win away to Ajax.

Goals either side of half-time from Ansu Fati and Simon Adingra sealed victory in the Johan Cruyff Arena against the Dutch giants, who despite a change of manager showed little more ambition than they had in losing at the Amex Stadium two weeks previously.

But the result was marred by the loss of three players to injury as Lewis Dunk, James Milner and the returning Pervis Estupinan were all forced off.

De Zerbi has previously spoken of the toll that a first season in Europe has taken on his squad, with a hectic schedule having put pressure on a relatively small pool as the absentee list has lengthened.

Estupinan, who has already missed much of the campaign, left the field just 12 minutes after making his return as a substitute in the second half, with Milner also having gone off in the eighth minute.

Captain Dunk was withdrawn at half-time after pulling up with what looked like a groin problem, though the manager said he suspected it was not a serious concern.

Still, De Zerbi emphasised the havoc that injuries continue to wreak on his team.

“I’m very worried but it’s a problem we are fighting in this moment,” he said. “We have a lot of injuries, especially in the full-back position. For that we have to find another solution. We play Sunday another crucial game (against Sheffield United) for us and we want to win.

“I don’t know (about Dunk) at the moment. I think it’s not a big problem, but he’s played so many games in a row. We have to understand better the (injury).”

Despite the injuries, Brighton were able to celebrate yet another landmark under De Zerbi as they won for the first time away from home in Europe.

There were particularly fine displays in attack from goalscorers Fati and Adingra, whilst Evan Ferguson and Joao Pedro – the Europa League’s joint-top scorer at start of play with four – also impressed.

“I’m really delighted for the result, for the performance, for our fans,” said De Zerbi. “They were incredible and we are very happy because we made them happy.

“We have three top players – Ansu Fati, Joao Pedro and Evan Ferguson. We expect always a great job in ball possession, in the last 20 metres. But they are very young.

“Today I’m very happy for the performance of Joao. He fought 90 minutes. He didn’t score but he played a great game.

“I’m satisfied but I expect always more and more. For Ansu, he played very well in the first half but after the second goal I think he could play better. He could score the third goal.”