It’s Rio or bust for Rafael Nadal…

The 28-year-old Spanish tennis star, a former World No. 1, looks to be on course to play at the 2016 Summer Olympics after an encouraging update on his fitness.

Nadal is due to be Spain’s flag-bearer at the 2016 Rio Games but is battling a wrist problem — he previously missed out on the honor due to injury in London four years ago.

Teammate David Ferrer said on Thursday that the 14-time Grand Slam winner will definitely travel to Brazil, while Nadal’s coach and uncle Toni was encouraged by Wednesday’s hit-out with Wimbledon champion Andy Murray.

Ferrer told Spanish radio station Cadena Ser: “I will travel with Rafa on Sunday to Rio.

“His situation is more delicate. It’s never easy to come back after an injury. He will see how he feels.”

Nadal is scheduled to play singles, men’s doubles and mixed doubles in Rio.

And Toni Nadal said: “We began to intensify his training in order to be ready be in time for the first round.

“Training with Andy Murray was a really hard first time with another top player and we are happy. Things worked out well.

“In Rio, we will start training with the maximum-level players and see how Rafael will respond to the difficulty of the competition.

“There are doubts about his game. I believe that is normal – these are the same questions we’ve always had after a period of inactivity. Starting with the Olympics is not easy but if we are lucky in the draw, he can improve step by step.”