Mats Wilander believes Juan Martin del Potro should have adopted a better tactic and played a better tennis in the US Open final against Novak Djokovic. The Serb won in straight sets, and Wilander has some regrets about the world no.

4's game. 'The second set was everything obviously for del Potro,' Wilander admitted speaking on Eurosport. 'He needed a better start in the first set, but I feel like Novak is a little bit more inventive, he plays tactically a little bit smarter than del Potro.

Juan Martin likes to just wait and wait and wait until he hits forehand and it all depends on the first serve. I think he could come to the net a little bit more. Novak got so used to get back the serve in play, is a little bit more complete, he wins points in different ways.

In the long run Novak will always win this match. The older you get, tactically the smaller you get and the more you come to the net. And Novak showed that. The atmosphere was unbelievable, exciting, it got loud and very much like football match in Europe.

It was a long match and physically very draining for both players.' Wilander thinks del Potro's game is too much about the forehand: 'It doesn't work against the very best players. It didn't work against Rafa Nadal at the French Open and Wimbledon.

It doesn't work here. There is just a slight difference between him and the best players. In terms of mentality, del Potro has it. It's just that tactically I would love to see him more surprising to his opponents.' ALSO READ: Mouratoglou: 'I coached, but also Toni Nadal, Bajin coached on every point'