David Moyes has described Jermain Defoe as "priceless" amid rumours of West Ham making a January bid for the Sunderland striker.
West Ham are said to be willing to spend £6m on the 34-year-old, though as Moyes - who makes his first return to Manchester United today since being sacked in 2014 - said: "He trains like he's much younger."
With eight goals in a Sunderland team that has only managed 15 in the Premier League this season, tee-total Defoe is 34 going on 24 and Moyes said of any bid: "No, it wouldn't be considered. I don't think there's any price because we know that Jermain's goals are so valuable to us. He's priceless.
"I wouldn't even think about it. He needs managing because he's a senior professional and needs treating right.
"I'm not saying we're getting the best out of him, because he's had a great career and he's scored a lot of goals, but nobody can turn around and say they can see a demise in him. You can only see someone who will keep going."
Of Sunderland's lack of goalscorers, Moyes said: "I'll be asking them all to get a couple in their Christmas stockings."