Gibson strained a knee ligament in the friendly against Real Betis last Sunday and is rated 50/50.
Full-back Tony Hibbert (calf) should return to training on Monday while Martinez hopes defender Antolin Alcaraz (hamstring) will be fit before the end of the month. Winger Magaye Gueye is also out.
- Sports & Recreation
- Tony Hibbert
- Real Betis
- Antolin Alcaraz