Massa received green flag for take part in third practice on Saturday morning but he just completed just 12 laps before abandoning his running.
Speaking on Sky F1 at the start of Practice Three, Di Resta said: “I’m ready to pounce if he needs a stand in.
“You’re very anxious. Nervous but very excited. You go straight in the deep end. It’s a tricky little track. You have to be very committed and confident. You just have to get in the car and do the job possible. There’s no pressure out there.
“Even if I drove this morning then I wouldn’t get to drive on high fuel and would only be one compound. I hope I would do as good a job or better than anyone else.”