The Argentina international has been sidelined since February, when he underwent surgery on a knee-ligament issue suffered against Crystal Palace. He was pictured this week training on the grass, as he continues his comeback.
"It's really important,” Ruben said, when asked about the mental impact of Martinez’s return to the pitch.
“When you have that injury, you have that time where you recover a lot of things really hard, then there is the boring part where it looks like you don't go to the next step.
“We miss a lot Licha, especially in this moment, we miss his aggression in everything he does, we miss him.