Although scans have revealed that Croatian international striker Jelavic suffered no serious knee damage in the Tigers’ 1-0 loss to West Brom at the weekend, he is still expected to be out for between three to six weeks.
Uruguayan forward Hernandez may also be in the treatment room for the majority of the rest of the club’s winter programme, with scans revealing he suffered a small grade two tear in his abductor muscle.
The normal recovery timeframe is around four to six weeks.
Hull have received some welcome news with Gaston Ramirez and Sone Aluko having an outside chance of being fit for Sunday’s Premier League trip to West Ham United.
Ramirez is making a quicker than expected recovery from a groin problem picked up against Everton on New Year’s Day, despite initially being ruled out for up to six weeks.
Aluko is also progressing well after missing the weekend defeat at the Hawthorns with a calf injury.
Midfielder Mohamed Diame is contining to make progress six weeks after limping out of the 1-1 draw at Everton with a knee complaint.
Diame is now out of a knee brace and has been given the green light to step up his rehabilitation, although an estimated return date has yet to be decided upon.
Andrew Robertson is on track to return from his ankle injury at the end of this month while Liam Rosenior remains in the early stages of a ten to twelve-week recovery period from a hamstring problem picked up on New Year’s Day.
The Tigers have also confirmed that Robert Snodgrass, injured on the opening day of the season at Queens Park Rangers, is continuing to make progress in his recovery from a dislocated kneecap, although it has now been confirmed that he won’t return to action before the start of next season.
Brian Lenihan, who returned from a loan spell with Blackpool in late November due to injury, is expected to be back in action in around four weeks.