Robbie Keane faces a race against time to prove his fitness as the Republic of Ireland's record goal-scorer eyes a glorious last hurrah at Euro 2016.

Keane missed Ireland's two friendlies against Switzerland and Slovakia in March after being forced to withdraw from the squad with a knee injury suffered while playing for LA Galaxy.

Usain Bolt will take the first long strides on his road to Rio here Saturday when he makes his 2016 track debut with less than three months to go before the Olympics.

The Jamaican sprint king is planning a successful defense of his 100m, 200m and 4x100m crowns in Brazil, an unprecedented "triple-triple" in what he has said will be his final Olympic games.

Japan on Friday said it would question officials involved in Tokyo's successful 2020 Olympics bid after French prosecutors launched a probe into an alleged illicit payment linked to the campaign.

"We will further work to confirm facts," top Japanese government spokesman Yoshihide Suga told a regular press conference, citing the French investigation.

Kevin Durant scored 37 points as the Oklahoma City Thunder completed a 4-2 series victory over the San Antonio Spurs to advance to a Western Conference finals showdown with the Golden State Warriors on Thursday.

He left the game to a standing ovation after a superb personal contribution that also included nine rebounds and two assists.

His trademark stubble shows the odd fleck of grey, but the advancing years are having no effect on the reflexes, and ambition, of evergreen Italy and Juventus captain Gianluigi Buffon.

At 38 years old, Buffon’s status as one of the greatest goalkeepers ever means he is a key figure for a redemption-seeking Italy side at Euro 2016.

With just over four weeks to go until the start of Euro 2016, the build-up to the European Championship continued on Thursday as hosts France named their squad, minus Mathieu Valbuena and Hatem Ben Arfa.

Valbuena's season has been overshadowed by the sextape blackmail affair in which he has been a victim and which has seen star striker Karim Benzema of Real Madrid dropped by his country.

Barcelona have the upper hand in a final day showdown with Real Madrid for the Spanish title on Saturday as they know a victory at Granada will ensure them a 24th La Liga crown.

Madrid are a point behind and have to stretch their winning La Liga run to 12 games at Deportivo la Coruna and hope for a Barca slip up to land the title.

Manuel Pellegrini has vowed to give Manchester City the perfect parting gift of a Champions League place at the expense of Manchester United, while champions Leicester will bring down the curtain on their astonishing season at Chelsea on Sunday.

With a memorable Premier League campaign coming to a conclusion with the final round of fixtures this weekend, the focus is split between the Manchester rivals' battle for the last spot in Europe's elite club competition and a fitting finale for Leicester as the fairytale champions bow out at the home of last year's winners.

It is a picturesque town 100 km south of Rome and notorious for high levels of pollution, but little Frosinone play the Serie A kingmakers on Saturday when Roma battle Napoli for runners-up spot and a sure Champions League place.

Despite Juventus securing a record-equaling fifth successive crown last month, there is still plenty at stake in Italy's top flight with Champions League and Europa League places up for grabs on the final weekend of action.

A delegation from Kuwaiti clubs lobbying for the FIFA Congress to lift a suspension of the nation's football association is confident of victory ahead of Friday's vote in Mexico City.

"So far, we have received a lot of support from the FIFA family and we are very optimistic," said Saad Al-Hootie, captain of the Kuwait team that reached the 1982 World Cup in Spain. "It's time to let our players play."