Former Chelsea defender William Gallas has revealed the biggest weakness of new Chelsea signing Benoit Badiashile.

Badiashile arrived at Stamford Bridge in a £35m deal from the Ligue 1 club as the Blues spent around £290million on eight new faces.

“Technically, he is really good,” Gallas told Genting Casino. “He has a presence and is very calm with the ball at his feet.

“He has a good left foot and is very composed. All the ingredients are there [but] I want to see how he responds to a physical challenge.

“When he has to go one against one with a good opponent. At Monaco, his weakness was his physicality – he struggled against bigger opponents in France.

“We know in England that the Premier League is a lot more physical than Ligue 1, so we will have to see how he responds to this challenge.”