Gatland says Wales know how tough this weekend's quarter-final against South Africa will be

Warren Gatland says Wales need to be able to match South Africa's physicality this weekend.

He's made three changes ahead of Saturday's quarter-final, bringin Dan Lydiate, Gethin Jenkins and Tyler Morgan, back into his starting XV. Gatland described as 'an out and out 13' and says he would have selected him against Australia if he'd not had a tight hamstring. Lydiate also sat out last week's Pool A decider against the Wallabies, after having a plate inserted in his eye having picked up a knock during the Fiji game.

Read more: Gatland names his side for 'huge battle' against the Springboks

Gatland says they're under no illusion as to the challenge they face against the Springboks this weekend.

"They have a good mix and a good balance. The shock of losing to Japan galvanised them as a team and a squad and they are going to be a tough proposition."

He admitted the coaching team has been critical of players during the tournament to ensure they make the right decisions during the games to avoid mistakes.