Swansea defender Alfie Mawson is confident that Portuguese youngster Renato Sanches will have a big impact for the Swans this season.

The 20-year-old has joined the Welsh club on a season-long loan move from Bayern Munich in the summer.

"He is a quality player, and in training he is so encouraging," Mawson said.

"The gaffer said last week he is going to take time to adapt, and he hasn't played a lot of football lately, so he needs to get that fitness back and when he does he will be a star player and it will be a joy to play with him.

"He did well (against Tottenham). Obviously, it is a tough test to come away to Tottenham, and he had a good performance."