Thomas Frank is confident Bryan Mbeumo will be a "fantastic success" at Manchester United as he hailed his former player's impact at Old Trafford.
Mbeumo spent six years under Frank at Brentford, scoring 20 Premier League goals last season to earn himself a summer move to United.
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The 26-year-old has hit the ground running and is United's top scorer with four goals, netting in the win over Liverpool at Anfield and then scoring a brace a week later against Brighton.
Frank predicted Mbeumo will go on to achieve big things at Old Trafford, even if he hopes that is paused when his Tottenham side host United on Saturday.
"No, I'm not surprised," Frank said of Mbeumo's form for his new club.
"Of course I'll step out of my role at Tottenham. When you work with a player for six years, you get a close relationship. To see him develop from being a young man, 19-year-old when he moved to London and Brentford and left six years later, going into one of the biggest clubs in the world with all that focus and the way he stepped up.
"For me, looking from the outside, maybe a little bit biased, I think he's been their best offensive player.
"He can create, he can score, he works hard, he's a team player. He's the perfect example, in my opinion, for a player what I call about attitude, confident but humble. He's a top player.
"I think he will have fantastic success there. I hope that for him, not tomorrow, but in general I hope and wish him all the best."
He will have fantastic success there. I hope that for him, not tomorrow, but in general I wish him all the best
Frank is not expecting any surprises in terms of United's set-up, with Amorim continuing to keep faith in his back-three system.
United sit level on points with Spurs heading into this match and Frank believes consistency has been the key to their upturn in form.
"Right now they are in a moment where they have more or less every key player available and he's found his team, played more or less the same team in the last four or five games," Frank said.
"We know exactly what to expect from them. I think they have an incredibly dangerous front three. They're starting to get more up to pace and we need to close them down.
"But on the flip side, make sure they run a little bit more backwards because we attack them."
