The tiny Pacific nation of Guam held Oman 0-0 on Tuesday to extend their unbeaten home record in a World Cup qualifying campaign which continues to defy the odds.

The team from the remote U.S. territory bounced back from last week's 6-0 hammering by Iran in Tehran with a brave display at their National Training Center ground.

Five facts on Tuesday's U.S. Open quarter-final between Serena and Venus Williams:

Nico Rosberg has no intention of giving Mercedes team-mate Lewis Hamilton an easy ride to his third world title despite falling 53 points behind him in the race for this year’s championship after Sunday’s Italian Grand Prix.

The 30-year-old German, who retired with a blown engine with two laps remaining, had his worst day of the season as the defending two-time champion Briton drove to his 40th career win in commanding style.

Lewis Hamilton cruised to his seventh win of the season at the Italian Grand Prix on Sunday, and nearly doubled his Formula One lead over Mercedes teammate Nico Rosberg, whose engine caught fire with two laps remaining.

However, Hamilton's victory was under question after stewards summoned Mercedes concerning tire pressures on both of their cars.

Spanish giants Real Madrid will donate one million euros (US$1.1m) to help support projects for refugees in Spain, the club announced on Saturday.

"Real Madrid states that it will donate one million euros to help refugees that will be hosted by Spain," they said in a statement.

Defiant Rafael Nadal vowed to fight on and restore his status as the game's most feared player after crashing to his earliest US Open exit in 10 years.

The 14-time Grand Slam winner was knocked out by Italy's Fabio Fognini, who pulled off a sensational 3-6, 4-6, 6-4, 6-3, 6-4 third-round victory.

Before they stepped on court, there was nothing to suggest Andy Murray would have any trouble against Adrian Mannarino in the U.S. Open's second round.

Murray, after all, is seeded No. 3, owns two major championships including at Flushing Meadows in 2012, and had reached at least the quarterfinals at the last 18 Grand Slam tournaments he'd entered. Mannarino, meanwhile, is ranked 35th, has never won a tour-level title, and only three times in his career has even managed to win more than one match at a major.

Iceland beat the 10-man Netherlands 1-0 on Thursday to take a big step toward qualifying for next year's European Championship.

Arjen Robben's first match as Netherlands captain lasted less than a half hour before he left the pitch injured and was replaced by Luciano Narsingh.

A drone buzzed over the court during a U.S. Open match in Louis Armstrong Stadium on Thursday night and crashed into an empty section of seats.

U.S. Tennis Association spokesman Chris Widmaier said no one was injured and that the New York Police Department was "conducting an ongoing investigation."

Four times, 2014 U.S. Open runner-up Caroline Wozniacki was one point from winning. Four times, her opponent in the second round this year, 149th-ranked Petra Cetkovska of the Czech Republic, came up with a winner to extend the match.

The fourth-seeded Wozniacki failed to convert any of those chances to close it out and lost 6-4, 5-7, 7-6 (1) to Cetkovska, who had not won a tour-level main-draw match all season until playing at Flushing Meadows this week.