"James Tomkins will be fit for the Chelsea game (on March 19)," Bilic told reporters on Friday.
Wales international Collins will sit out Premier League trips to Everton and Chelsea, and the Hammers' FA Cup quarter-final against Manchester United.
"It's his hamstring and it's not a couple of days. The first information is that we should be happy if he only misses three games," Bilic told reporters on Friday.
Tomkins and Collins joined fellow defenders Winston Reid, Joey O'Brien, Carl Jenkinson and Sam Byram on the injury list.
Bilic is hoping to welcome back winger Victor Moses and striker Enner Valencia for the Cup clash at Old Trafford on March 13.
"Victor Moses and Valencia should definitely be back for the Cup game against Man United," the former Croatia manager said.
(Reporting by Shravanth Vijayakumar in Bengaluru; Editing by Ed Osmond)
Share
