Rangers head into the second leg of their Scottish Premiership playoff quarter-final with Queen of the South having opened up a 2-1 advantage over their opponents at Palmerston Park.
The result in the first leg makes the Glasgow giants clear favourites to progress to a semi-final tie with Hibernian, but the Doonhammers will be aware that they can perform without pressure as they target a first season among Scotland's elite.
Rangers skipper Lee McCulloch has been rated as 50-50 to return to the squad after missing the first leg through injury.
McCall has also revealed that defender Bilel Mohsni is in contention after taking part in training this week.
Barring any late fitness issues, Fowler should have the same squad at his disposal, but changes could be made for the trip to Glasgow.
Mark Millar may come in for Stephen McKenna, while Iain Russell is pushing for a starting role.
Rangers possible starting lineup:
Bell, Foster, Zaliukas, McGregor, Wallace, Shiels, Law, Murdoch, Smith, Miller, Vuckic
Queen of the South possible starting lineup:
Clark, Dowie, Durnan, Higgins, Holt, Kidd, McKenna, McShane, Carmichael, Reilly, Lyle
Tag : Scottish Championship