Manchester United boss Ole Gunnar Solskjaer is wary of pushing Edinson Cavani too hard.
Solskjaer admits the striker is unlikely to face Sheffield United tomorrow.
He said, "We have to be mindful of little strains and niggles and decisions have to be made from kick-off of Sheffield United to kick-off at Arsenal, it's 15 times 24 hours, so it's gonna be very tight.
"Edinson has done well in rehab, still have to make the decision if we should risk him, it is a little bit to risk him too early, I'd doubt him to be available to pick tomorrow.
"Yeah, Marcos [Rojo] has just felt a niggle in his calf again, his worked really hard to come back, played for reserves, got a knock, worked hard again and hopefully he's back in January, Marcos.
"Phil [Jones] should be ready by January and Sergio [Romero] has been training hard as well."
