Often enough for you to state categorically he's better than Willian and Oscar apparently (which he is not). His ability was never the issue anyway as I've explained before. He wasn't prepared to work as much as demanded by the manager nor bide his time. He gets a good move, we make a tidy profit and everyone moves on. It may end up a bad move but for every Matic there is a Scott Sinclair, Carlton Cole and various others who have never shown they are good enough to get in our 11. Still not sure why you care.
Have you seen him for Wolfsburg this year? He's tearing it up, he's clearly much better than Oscar and Willian. Why should number 10's work? This is the problem with Mourinho. Set's his teams up to play boring football. Leave the attackers to attack ffs. Willian's more a RB than he is a winger.
Willian used to be a very exciting player actually but Mourinho's beaten that out of him and now all that's left is a right back, as you say.
Therefore we might as well close these forums down. If managers all know best, what is there to be discussed. Did the "leagues most successful manager" employ the best tactics in the CL this year?