The Premier League summer transfer window came to a close last week with the clubs spending £2.4 billion by the end of deadline day.

Despite that, there are a number of leagues around the world with their windows still open allowing clubs to sign players from outside of their own league.

That includes the Saudi Pro League, a league that has seen a number of high profile signings from the Premier League including Kalidou Koulibaly, Edouard Mendy and Ruben Neves.

That could cause an issue for Jurgen Klopp’s Liverpool as Al-Ittiihad continue their pursuit of Mohamed Salah with it being reported the club are willing to offer up to £200m.

Ruben Neves was one of a number of high-profile signings to join the Saudi Pro League this summer

Mail Sport breaks down the transfer windows around the world that could have the biggest impact on the Premier League 

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 Which windows are still open and when do they close?

• Belgian Pro League – Wednesday, September 6
• Saudi Pro League – Thursday, September 7*
• Swiss Super League – Thursday, September 7
• Croatian Football League – Friday, September 8
• Czech First League – Friday, September 8 
• Super League Greece – Monday, September 11
• Turkish Super Lig – Friday, September 15

 *Saudi Pro League confirmed they have shortened their window originally scheduled to close on September 20.

What are the biggest rumours? 

Liverpool attacker Mohamed Salah is expected to be rested for Egypt in the upcoming international break amid ongoing links to Al-Ittihad.

Demarai Gray accused Sean Dyche of not respecting him and has been linked with a move away

Meanwile, Everton winger Demarai Gray is in talks to join Steven Gerrard’s Al-Ettifaq, with the Toffees digging their heels in after the player accused Sean Dyche of not respecting him.

Elsewhere, Sergio Ramos has agreed to re-join boyhood club Sevilla despite interest from Saudi side Al-Ittihad as well as interest from Turkish clubs.

And Atletico Madrid winger Yannick Carrasco is set to have a medical with Al-Shabab ahead of a £12m deal.