Chelsea management are delighted with the progress of Nathaniel Chalobah this season.
Chalobah was outstanding with Watford.
Blues U21 coach Dermot Drummy told chelseafc.com: "Nathaniel Chalobah playing at Wembley is as close as you can get to a fantastic loan,' he says. 'We have watched him, he has matured, he is a lovely lad and gets to our first team games as much as he can. He has progressed a lot on loan."