Unbeaten in their last 14 matches in all competitions, FC Barcelona are on a four-game winning streak in LaLiga.
Jules Kounde, Ronald Araujo, Frenkie De Jong and Memphis Depay have sustained injuries while playing for their countries.
A club statement confirmed the news on Wednesday, while it is believed a fee in the region of £56m convinced Leeds to part ways with their star man.
Leeds is chasing a number of reinforcements this summer with Raphinha and Kalvin Phillips set to leave Elland Road. Raphinha is closing in on a move to Chelsea, while Man City is close to wrapping up a deal for Phillips.
Brazilian Raphinha fired Leeds ahead in the 26th minute of a breathless opening half with a vicious low free kick that beat a diving Kasper Schmeichel and crept into the bottom left corner before Leicester hit back in style two minutes later.
The Whites found it difficult against Ole Gunnar Solskjaer’s side in their season opener, but Everton started life under Rafael Benitez with an impressive 3-1 victory over Southampton at Goodison Park.