Novak Djokovic’s coach, Marian Vajda, has admitted he was surprised the Serb defeated world number one Rafael Nadal in the semi-final of Wimbledon, the Daily Express report.

Djokovic secured his fourth Wimbledon title last week after defeating South African Kevin Anderson in the final at the All England Club.

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Djokovic spent the final six months of last year on the sidelines due to an elbow problem but did pick up some valuable momentum at Queen’s where he made it to the final.

Before defeating Anderson in the final, Djokovic came through a gruelling five set semi-final against Spaniard Nadal.

The match lasted over five hours across the course of two days with Djokovic coming out on top in the final set 10-8.

That performance came as a surprise to many due to Djokovic’s injury problems over the past 12 months, including coach Vajda.

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Vajda admitted he thought Nadal would come out on top in the deciding set, praising the Serb’s mental attitude.

I didn’t believe so much during the semi-finals he would beat Rafa (Nadal), because Rafa was mentally much better and winning Grand Slams and coming into the semi-finals much better.

But mentally it was something amazing that happened in the fifth set.

He hasn’t had experience against opponents like Nadal in a long time, I don’t know how he found it, but he just went for the balls, he had more courage to go for it and he made it simple.