Juan Martin del Potro wants to have a supercoach. In the first three events or the year (Delray Beach, Indian Wells and Miami) the captain of the Argentinean Davis Cup team Daniel Orsanic followed him, but it's clear that he needs a new permanent coach.

He revealed that he contacted Pete Sampras and Guga Kuerten, but explained how at the moment it's difficult to reach an agreement. 'It would be beautiful that someone can follow me. I spoke with some people but at the moment they can't.

It's complicated because many of them have several commitments,' he said during the presentation of his three-year partnership with San Cristóbal Seguros brand. Speaking about Davis Cup Del Potro didn't confirm his presence for the Davis Cup play-offs tie against Kazakhstan in September.

'Today I feel happy for what I did in Davis Cup. We finally brought home the Cup in 2016, and so now I set other challenges. When I think about Davis, honestly I think about what happened and not about the future.' As for his immediate future he will play ATP 250 Estoril in ten days, then Madrid, Rome and Roland Garros.

'The calendar continues to be like planned. I took time off to be able to train well. It's a pleasure for me to come back on clay, which isn't the most suitable surface for slice backhand. So I will hit it more using two hands.

In the practice sessions I am hitting backhand at full force, I hit stronger than I do in matches. I am having good signs from the wrist, in the last period I got used to some pain,' said Del Potro, who has not been competing since Miami last month.

Meanwhile on Twitter Del Potro announced his schedule until the end of August: after the clay-court events, he will play on grass in 's-Hertogenbosch, Queen's and Wimbledon, and then on hard-courts in Washington, Montreal, Cincinnati and US Open.