Juan Martin del Potro took down the five-time defending champion Roger Federer to capture the US Open title this week.

The Argentine player kept the pressure on the player many hail as the greatest in tennis history, one he had never beaten in six prior attempts, to complete a dramatic 3-6 7-6 (7-5) 4-6 7-6 (7-4) 6-2 upset after four hours and six minutes.

“A dream came true,” said a tearful Del Potro. “I don’t have words to explain how I feel.”

No. 1 Roger Federer has won his 38th straight match at the U.S. Open, moving into the quarterfinals with a victory over No. 14 Tommy Robredo.

Federer, in search of his sixth straight title at Flushing Meadows, split the first 10 games against his Spanish opponent Monday, then won 14 of the next 18 for a 7-5, 6-2, 6-2 victory. He was off the court in 1 hour, 48 minutes.

His next match will come against No. 12 Robin Soderling, whom he beat in straight sets earlier this year in the French Open final to complete his career Grand Slam.

Oregon has suspended running back LeGarrette Blount for the remainder of the season for punching Boise State linebacker Byron Hout on Thursday, right after losing to Boise. A replay of the incident showed Hout taunting Blount as the teams converged onto the field. As a Broncos assistant coach moved to separate Hout from Blount, the Oregon senior threw a right cross that connected with Hout’s right jaw.

“Under no circumstance is fighting acceptable,” the NCAA said in a statement Friday. “If it occurs before or during a game, the officials enforce the rules. If it occurs after a game, institutions and conferences decide how to address the situation. We trust our members to handle these situations appropriately. Sportsmanship is everyone’s responsibility, including student-athletes, coaches, officials, institutions and fans.

In a statement prior to Blount’s suspension, Oregon president Richard Lariviere called the player’s behavior “reprehensible.”