Former Chelsea star Pat Nevin says newly appointed Blues manager Andre Villas-Boas must be given time to make his mark at Stamford Bridge.
The 33-year-old ex-FC Porto coach has been offered a three-year contract to succeed Carlo Ancelotti in the managerial hot seat.
Under the ownership of Roman Abramovich, Villas-Boas can expect a baptism of fire, in a results-driven business, but Nevin believes the inexperienced coach will need time to settle in England.
"I always think a manager should be given time to put his stamp on the team and that doesn't mean six months or a year," he said.
"He has to put his own system in place with his own players and I would say the minimum any manager should get to stamp his impression on a new club should be three years."
Nevin deflected criticism of Chelsea's decision to appoint a coach with little managerial experience, and a lack of understanding of the English game, having spent only 12months in charge at Porto.
"There is always a risk with every managerial appointment," Nevin continued. "But he is highly regarded as one of the up-and-coming young European coaches and has been successful in domestic and European competition.
"He is flavour of the moment and Chelsea have seen something in him, and he has worked at the club before.
"The Premier League is exposed globally to the coaching fraternity and most of all you can look at people like [Jose] Mourinho and [Arsene] Wenger who had not managed in England before and were very successful."