The Mexican striker is still recovering after a fractured skull he sustained on November 29th.
Nuno admits he feared Jimenez would be out for a very long time, but believes the 29-year-old will be with the first team before this term concludes.
Asked about Jimenez, Nuno told reporters: "We are truly positive that this can happen. It's very good news the way he keeps improving day by day.
"Not only me but all the medical staff are surprised because he's improving on all the concussion tests that we did previously two seasons ago. He's doing really, really well.
"Just by seeing him running and lifting weights and doing all these strong training sessions, it's a big lift for everybody because first of all it's (about) the man.
"It's Raul, we want Raul back healthy and then we will get back Raul as a player and an important player for the team. The big lift for us is just having him around."
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