Diouf, a defender from Senegal, has been attracting the attention of foreign clubs for a long time. West Ham has been the main bidder for some time, but negotiations dragged on until they received a significant boost from the sale of Mohamed Kudus to Tottenham.

According to Bilek, the offer from West Ham is the most expensive outgoing transfer in the history of the Czech league. Slavia's boss, Jaroslav Tvrdík, was initially cautious about the deal, but later hinted that Diouf would likely leave the club before the start of the season.

Diouf was a crucial player for Slavia last season, scoring seven goals in 27 league games and helping the team win the title and qualify for the Champions League.

Slavia's sporting director, Bilek, has now confirmed that the transfer will go ahead, making Diouf one of the most expensive players to leave the Czech league.

It's worth noting that Slavia had also sold another player, Antonín Kinský, to Tottenham in the winter, and it seems that they are making the most of the transfer market.

While the exact details of the transfer are not yet clear, it's certain that Diouf will be joining West Ham soon, bringing an end to his time at Slavia Prague.

Diouf's move to West Ham is a significant development in the transfer market, and it will be interesting to see how he performs in the Premier League.