NEIL Harris said Steve Morison "is getting better and better" after confirming the striker had signed a contract extension.
Morison's new deal will take him up to the summer of 2018, when he will be almost 35. Morison had a clause in his contract to trigger a new deal based on a performance target, but Millwall moved to extend his stay before that was activated.
The 33-year-old centre-forward scored his eighth goal of the season to add to strikes from Lee Gregory and Calum Butcher as Millwall won 3-1 at Northampton, who had Jak McCourt sent off.
And Harris sees no signs his former team-mate is slowing down.
"I'm delighted for Steve Morison coming back to his old ground, it was a fine way to celebrate signing a new contract," Harris said.
"We wanted to say to him, 'you don't have to make those games, we want you at this football club'.
"There were players on that pitch running past people at the end of the game, and they weren't necessarily the youngsters either.
"Age is relevant, of course it is, but with modern technology and science you can keep playing. Steve, for me, is getting better and better as he gets older."
Millwall's win at Sixfields was their first in the league in seven games, and Harris paid tribute to his players for their application during the international break.
"I'm pleased for my players, that's for sure," Harris said. "It's been a collective effort the last couple of weeks. I just said to them that the attitude to want to learn and train has been brilliant.
"Everything we worked on in training came off for us, that's really key. It's key for me as a coach and key for my players to see that desire they put in to want to be better to get the reward is the best thing.
"At the start of the second half Northampton changed their shape to pose us a few more problems and we adjusted slightly.
"The red card wasn't game-changing because I saw Northampton play last week with 10 and they were better. I knew they would be more physical, even more direct.
"I said to the boys what we experienced second half we're going to get again on Tuesday night (against Bolton). So this was a good learning curve for us.
"I would have liked the boys to have gotten a clean sheet but I'm more excited about the three goals and we scored and the chances we created."
Image source: ©Charlie Compitus