Manchester United great Roy Keane believes Frank Lampard's job at Chelsea is under threat.

Lampard guided the Blues to fourth place in his first season as manager, helping to navigate the club through a transfer embargo.

However, despite a positive start that put Chelsea in the title race going into December, four defeats in six Premier League games has seen their season at threat of unravelling.

Their latest reversal, a 3-1 humbling by Manchester City, leaves Lampard's side seven points behind league leaders Liverpool, having played a game more.

“Frank always comes across well. I didn't realise the word patience existed at Chelsea, particularly for managers," Keane told Sky Sports.

“I don't think Frank's going to get much time. There's huge pressure this year, you have to give players time to settle coming from foreign countries.

“Last year he had a free pass, but they've spent money and it brings added pressures, no matter who the manager is.

“Every team has injury problems, he's got to get ready. When you start questioning work rate and desire, no matter how good a team you are, you're going to slip up.

“He's new to it. He's 42 years of age. Klopp came from Dortmund and won big prizes over there. He's up against all these managers – Ancelotti, Mourinho, Guardiola. These guys have got CVs behind them. He won't get the time Klopp got."