Rafael Nadal remains doubtful for the upcoming 2014 U.S. Open after sustaining a wrist injury last week, which forced him to skip two key tournaments.

Toni Nadal, the tennis superstar's uncle and coach, told Tennis World USA that Rafael is on pace to make it into the tournament that is scheduled to start on Aug. 25, but the final decision will be made after an MRI a week before the tournament.

"Theoretically we can come, but we'll see. I guess a week before and we'll know if the injury is on track. Let's wait until the end. The date is no limit. When we are good we will compete, and if we are not well, we will not compete," Toni Nadal said.

The second-ranked Rafael recently announced that he would skip two U.S. Open tune-up tournaments -- the Toronto tournament scheduled to start on Monday and the Cincinnati tournament that will begin on Aug. 11.

Rafael won both tournaments last year. His coach said that the 14-time Grand Slam champion was down since he could not to defend the title, while also adding that they need to figure things out if ever they'll make it to the U.S. Open.

"When you are injured you are always a little 'morally wrong, especially at this time," Toni said. "There are times when an injury does not affect much the season but this is not the case because we have to skip two Masters 1000 Rafa won that last year. Now we just need to figure out how to arrive at the U.S. Open."

Rafael is already back on practice courts but is still wearing a split on his right wrist. Toni expressed confidence that they Rafa will be ready to compete even if they won't compete in a tune-up tournament.

"There are training with the forehand, the volley, service and backhand slice," Toni explains. "If the board was in favor of New York in the early rounds, Rafa would have the opportunity to find the best solution because it is not even a beginner who needs to play a lot of games. He knows what he must do."

But even if Rafael makes it into the U.S. Open, the 28-year-old could go down in the world rankings and might not be in contention for the top spot in the year-end rankings.