Sheffield United boss Chris Wilder was delighted for matchwinner Lys Mousset after victory over Arsenal.
Wilder admits a "lot of work" has gone into the striker since his summer arrival from Bournemouth.
Wilder admitted: "Lys has been knocking on the door for a while.
We had to get him up to speed and a lot of work has gone in, with the conditioners and others, to help him get ready.
"He's a popular boy with the other players and he's a popular boy with the supporters as well.
You can see why they've taken to him."
