Giannis Antetokounmpo

Two-time NBA MVP Antetokounmpo was the driving force behind Greece qualifying for the Games, but they are on the brink of an early exit after suffering their second defeat in Group A.

Antetokounmpo was in fine form, adding 11 rebounds to his tally, but Spain, who also lost their opening game, just had too much.

Spain were inspired by Memphis Grizzlies forward Santi Aldama, who registered 19 points and 12 rebounds.

They are up to third in the group, and will face table-topping Canada in their next fixture. Greece, on the other hand, must now beat Australia to stand a chance of progressing and keeping Antetokounmpo's Olympic dream alive.

In Tuesday's other Group A game, Canada overcame Australia 93-83, with R.J. Barrett of the Toronto Raptors scoring 24 points.

Antetokounmpo has not previously featured at a Games, but is now set to debut after Greece qualified for the 12-team basketball tournament.

They beat Croatia 80-69 on Sunday, and will now face Australia, Canada and Spain in the group stage in Paris.

And two-time NBA MVP Antetokounmpo believes Greece should be gunning for gold.

"The best athletes in the world compete in the Olympic Games," Antetokounmpo said.

"We have nothing to lose. I really believe we have an incredible team and we can accomplish something special."

Spain and Brazil also booked their places at the Games on Sunday, beating the Bahamas and Latvia respectively.