Sherwood is struggling to pick up points with Aston Villa.
The ex-Villa head coach said: “I guarantee Tim will be thinking ‘where’s my next win coming from’. As long as you're not winning that gap [between survival and relegation] gets bigger.”
Villa have four points from eight games, but six defeats in a row have seen them fall into the relegation places - and only one point ahead of last place Newcastle.
There is already a four point gap between Villa in the final relegation place and West Brom in 17th, and with the run of fixtures that Villa have coming up, that gap could become wider and wider very quickly.
Lambert believes Sherwood will be worrying about where his next win is coming from, but the real worry is where will Villa’s next point come from.
When they return from the international break, Villa take on Chelsea - admittedly out of form, but with undoubted quality - Swansea, Southampton, Tottenham, Manchester City and Everton.
They are all games that will be expected losses, and it is not until November 28 that Villa host a game they should win on paper. They take on a Watford side, who will still be a tough opponent, and have been better away from home than at Vicarage Road.
Villa look to have a tough season ahead, and Lambert is correct to worry about VIlla’s form, with points looking scarce for the Midlands side in the coming months.