Frank Lampard has revealed why Chelsea signings Timo Wernerand Hakim Ziyech are yet to join up with their new team-mates at Cobham.

Chelsea acted fast - and crucially, ahead of their rivals - to get deals for Werner and Ziyech over the line before the end of the disrupted 2019-20 campaign.

Werner bypassed the opportunity to help RB Leipzig try and win the Champions League in August, instead agreeing a move to Chelsea before the European Cup could restart.