Rain delayed the start of play at Wimbledon on Thursday just 24 hours after the All England Club sizzled in record temperatures.

The mercury had climbed to a blistering 35.7C at the grass-court Grand Slam on Wednesday, leading one ball boy to be taken ill on court, while Australian star Bernard Tomic complained of heat-induced dizziness.

The United States has demanded the extradition of seven FIFA officials detained in May setting off what could become a prolonged legal battle over the handling of the major corruption case.

Swiss authorities said Thursday that the U.S. embassy in Bern had sent an extradition request the day before.

International football returns to Liberia this weekend when they host Guinea in a 2016 African Nations Championship (CHAN) qualifier after the lifting of an Ebola-induced ban.

The 13-month suspension was scrapped in May by African football governing body CAF and Guinea will be the first foreign side to play in Monrovia since that decision.

Danny Blind was named as new Netherlands coach on Wednesday, taking over from Guus Hiddink who left the post with the Dutch team struggling to qualify for Euro 2016.

"Danny Blind has been appointed as new coach of the Dutch eleven, starting from August 1," the Royal Dutch Football Federation (KNVB) said in a statement.

Japan's fifth seed Kei Nishikori pulled out of Wimbledon on Wednesday after a calf injury prevented him from playing his second round clash.

Nishikori was scheduled to face Colombia's Santiago Giraldo for a place in the last 32.

Bayern Munich completed their first big transfer of the off-season on Wednesday by signing Brazil international Douglas Costa from Ukraine side Shakhtar Donetsk for a reported 30 million euros ($33.3m).

The fleet-footed winger or striker has signed a five-year deal with the German champions and will battle for a place on the left wing with Franck Ribery, who is struggling with a persistent ankle injury.

NBA free agency opened with Anthony Davis and Kawhi Leonard agreeing to contract extensions to stay where they are, and the Los Angeles Lakers and New York Knicks among the teams looking for a dominant inside force of their own.

All-Stars LaMarcus Aldridge of Portland and Marc Gasol of Memphis lead the list of big men that includes DeAndre Jordan of the Clippers, Tyson Chandler of Dallas, and twins Brook Lopez of the Nets and Robin Lopez of Portland.

Veteran Brazil striker Robinho said Tuesday that he is leaving Brazilian club Santos and will reportedly play in China for Guangzhou Evergrande, now coached by Luiz Felipe Scolari.

Santos said it could not match the offers made for the 31-year-old striker, especially from international clubs.

Lionel Messi helped set up five goals as Argentina trounced Paraguay 6-1 in the Copa America semifinals on Tuesday, setting up a final against host Chile.

Messi assisted in first-half goals by Marcos Rojo and Javier Pastore and one of Angel Di Maria's second-half goals. The Barcelona star also helped set up the final two goals by Sergio Aguero and Gonzalo Higuain.

Carli Lloyd remembers putting the ball on its spot and shutting out the noise of more than 51,000 anxious fans.

Then she blasted that ball into the back of the net.