Elsewhere, Eintracht Frankfurt reached the last 32 with their fourth win from as many group games by beating Apollon Limassol 3-2 in Cyprus, while Lazio joined them in progressing from Group H as goals from Marco Parolo and Joaquin Correa secured a 2-1 win over Marseille to eliminate last season's runners-up.
"It is a bit more flexible now, I would say, with a little bit more freedom to go forward".
"I like Ross very much".
"Andre has come in and been very good as well, and our left-back (Digne) played for Barcelona".
"I think they can play together, but I think Loftus-Cheek has got to play one of the wider roles if Barkley plays, where your [Eden] Hazards, Pedros and Willians are", he added.
But Arsenal striker Danny Welbeck, given a rare start just hours after being named in Gareth Southgate's England squad, had to be stretchered down the tunnel with what looked a nasty ankle injury in the first half.
The Blues were beginning to pose a constant threat but just before the hour mark, Mikalay Signevich nearly found an equaliser for BATE with the striker seeing a shot hit the underside of the crossbar after he had got in the way of a miscued effort from distance.
As the game clicked into the 51st minute, Hazard was fouled and sent the resulting free-kick soaring out of play beyond the far post.
BATE had no such difficulty at the other end and the home side nearly went ahead in the 12th minute through Dzmitry Baha, but the midfielder's 25-yard strike hit the post with Kepa Arrizabalaga beaten.
Maurizio Sarri has an enviable record and even managed to oversee this victory while suffering from a fever, presumably the same illness that befell Cesc Fàbregas and ruled him out of this game.
"But you always need to keep working hard in training and keep believing, keep the faith".
"Our fear is that they are very similar, want to get on the ball, want to travel with the ball", Sinclair said on Chelsea TV.