Sunderland owner Ellis Short is taking his time over appointing Paolo Di Canio 's successor .
Sunderland owner Ellis Short is carrying out due diligence on Gus Poyet , Steve McClaren , Rene Meulensteen and Sven - Goran Eriksson .
Sunderland owner Ellis Short is taking his time over appointing Paolo Di Canio 's successor and is carrying out due diligence on Gus Poyet , Steve McClaren , Rene Meulensteen and Sven - Goran Eriksson .