Miguel Llera played under Di Matteo at MK Dons and revealed that the "friendly" Italian can get angry when he doesn't like what he sees.
Norwich City have completed a move for the Tottenham Hotspur midfielder.
Ibrox side Glasgow Rangers are still on the hunt for more additions this summer.
The Whites winger endured a frustrating time in his debut campaign at Elland Road.
West Ham United take on Slovenian outfit Domzale in the 2nd leg of their Europa League qualifying tie this evening.
David Moyes has been linked with bringing Liverpool striker Christian Benteke to Sunderland, and he reportedly wanted him at Manchester United.
The young defender was confirmed as club captain today.
The Leeds United player has had a transfer request turned down but that might not stop West Bromwich Albion chancing their hand with a significant bid.
The Spaniard named Jamaal Lascelles as the club's captain on Thursday.
The Argentine left the club in January for Italian side Fiorentina.