Middlesbrough boss Aitor Karanka will demand his players pay extra attention to Sunderland's veteran striker Jermain Defoe in Sunday's Wear-Tees derby clash at the Stadium of Light.
Defoe's 15 Premier League goals last season helped secure Sunderland's safety- he scored five in their last nine games - and there were calls for the 33-year-old to be included in England's Euro 2016 finals squad.
'It's difficult to stop him because he's the kind of player, when you're always behind him it's easy to mark him but, I don't know why, he scores every single week,' Karanka said.
'So for that reason it's going to be difficult.