The video assistant referees were called upon for several key decisions at the Confederations Cup in Russia on Sunday, as Portugal were held 2-2 by Mexico and Chile beat Cameroon 2-0.

Cristiano Ronaldo will put speculation over his club future firmly to one side as he leads European champions Portugal into their Confederations Cup opener against Mexico in Kazan on Sunday.

Angelique Kerber suffered a fresh blow on Sunday when a hamstring strain forced the world number one to withdraw from the Aegon Classic in Birmingham.

Real Madrid coach Zinedine Zidane broke off his holiday to call Cristiano Ronaldo in a bid to persuade his unsettled star not to quit the club, Spanish sports daily Marca claimed on Sunday.

Estonia's Anett Kontaveit scooped up her first WTA title after beating Natalia Vikhlyantseva of Russia 6-2, 6-3 in Sunday's 's-Hertogenbosch final. 

World champions Germany will field an inexperienced line-up against Australia in their Confederations Cup opener on Monday with striker Timo Werner fearing a robust challenge from the Socceroos. 

Frenchman Lucas Pouille came from a set down and needed a second set tie-break to beat Spain's Feliciano Lopez 4-6, 7-6 (7/5), 6-4, to claim the grass-court title at Stuttgart on Sunday.

With the Confederations Cup starting on Saturday when hosts Russia take on New Zealand in St Petersburg, here are five things to know about the June 17-July 2 tournament:

A 56-year-old Argentine banker pleaded guilty in New York on Thursday to transferring more than $25 million in bribes in the massive FIFA corruption scandal that has rocked world soccer.

Golden State Warriors star Stephen Curry said Wednesday that if the team is invited to visit the White House after winning the NBA championship then he probably won't go.