Manchester City boss Pep Guardiola and Liverpool manager Jurgen Klopp say they are bewildered by Chelsea's huge spending spree during the January transfer window.

John Heitinga, who was serving as interim coach at Ajax after the dismissal of Alfred Schreuder, will continue in the job until the end of the season, the Dutch club announced Thursday.

Belgium international Thorgan Hazard has signed with Dutch club PSV Eindhoven on loan from Borussia Dortmund, the German club announced on Tuesday. German media reported that Eindhoven will cover the cost of Hazard's wages for the remainder of the season.

After a second-successive 1-1 draw on Tuesday, Bayern Munich sporting director Hasan Salihamidzic it was "high time we flicked the switch", warning "the title is at stake".

The United States men's national team, already without a permanent coach, was plunged further into turmoil on Thursday with both the federation's Sporting Director and the national team General Manager quitting their jobs.

Premier League clubs have broken the record for transfer spending during the January window with a £440 million ($542 million) spree, according to sports finance experts Deloitte.

Feyenoord reached the halfway point in the Dutch season top of the table Sunday despite drawing the "Klassieker" 1-1 at home against defending champions Ajax Amsterdam.