The Manchester United boss says the Portuguese manager faces a tough test in north London, but believes he will continue with his own playing philosophy at White Hart Lane
Since Villas-Boas took charge at White Hart Lane in July, Tottenham have secured eight points from a possible 15 in the Premier League and have also made it through to the fourth round of the League Cup following a 3-0 victory over Carlisle United on Wednesday.
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"He has a challenge," Ferguson told reporters. "He wasn't at Chelsea very long, but he came to our ground early last season and his team tried to play football.
"That's his philosophy and I think he's carrying that out at Tottenham as well. He suits Spurs. They've always had a history of playing good football. I think he'll carry on that way.
"I hope they do well because it's a difficult industry these days, particularly for a young manager.
"It must be very daunting and challenging to go to a big club. It's full of risk because it's a results industry."