The Villa boss is already trying to cope with a horrendous injury list as Richard Dunne has been absent all season, while fellow central defender Ron Vlaar has missed the last seven games.
Charles N’Zogbia, Darren Bent and Gabby Agbonlahor have also been missing for the past few weeks along with several others so the loss of influential midfielder Westwood is the last thing Lambert needs at this moment in time.
The summer signing from Crewe limped off with nine minutes remaining at the Liberty Stadium following a crunching challenge by Michu and, following an examination by the Villa medical staff on Wednesday, Lambert admitted he is concerned ahead of the FA Cup third-round tie with Ipswich on Saturday.
“He’s hobbling about and it will be a blow if he’s out because we have too many injured,” said Lambert in the Birmingham Mail.
A goal apiece from James Tomkins and Luka Milivojevic handed Crystal Palace a crucial 2-0 win over Huddersfield at the John Smith's Stadium on Saturday evening.
Manchester United bounced back from their Champions League exit as they beat Brighton 2-0 at Old Trafford on Saturday night to reach the FA Cup semi-finals.
Tottenham reached the FA Cup semi-finals after they cruised to a 3-0 victory over Swansea in their quarter-final clash at the Liberty Stadium on Saturday.
Premier League basement club West Brom squandered the lead as they suffered a 2-1 defeat to Bournemouth at the Vitality Stadium on Saturday.
Chesterfield boss Jack Lester felt his side were unlucky not to claim all three points after their 1-1 draw at Cheltenham.
New Swindon manager Phil Brown revelled in his side's victory at Cambridge in his first game in charge.