I think Mourinho has already selected one and is not going to change. When we defend it is 4-1-4-1. Once we're in possession, it is initially 4-2-3-1 or 4-2-4 to be exact and then one fullback moves up to MF making it 3-3-4. Chelsea play it since Mou time there and Sari liked it as well. Lampard also plays what JM called Conte system 3-5-2. Poch used it as well, but current Spurs do not feature pacey wing-backs anymore for such. For the same reason 4-3-3 will not work well either. So I would agree with JM formation.