Arsenal play derby in FA Cup semi - final on Saturday evening . derby face off against Manchester United 10 days later . Wenger says ' something should be done ' and ' it is difficult to understand ' Arsenal manager also talks circus around Jurgen Klopp ' ridiculous ' Klopp saying on Wednesday he will leave Dortmund this summer .
Arsenal play Reading in FA Cup semi-final on Saturday evening . Chelsea kick off against Manchester United 10 minutes later . Wenger says 'something should be done ' and 'it is difficult to understand ' Arsenal manager also brands circus around Jurgen Klopp 'ridiculous ' Klopp announce on Wednesday he will leave Dortmund this summer .