The Ajax boss has been linked as the next Everton manager.
Shane Duffy could be about to be given his longest spell in the spotlight at Goodison Park as Jonny Heitinga struggles for form and injury problems leave Phil Jagielka playing at right-back. Is he up to the task?
Everton pulled the plug on the deal after his medical showed up some issues concerning his knee. Should they have done what the likes of West Ham, Newcastle United and Chelsea have with Ba and taken a chance?
Who has been linked with a move to Goodison? What do they need? Who could they lose? Here is a look at all the talk about Everton's last minute transfer dealings.