Porto goalkeeper has temporarily withdrawn from selection for first-team football whilst he recovers from a heart attack.
At the start of May, the 38-year-old fell ill during training with Porto and was rushed to hospital where he underwent emergency surgery.
Whilst that was a success and Casillas was discharged five days later, it had appeared unlikely that he would return to first-team football but he has since recuperated for two months and returned to training earlier this month.
However, as Marca now outline he has stepped back into a coaching capacity at the club but he has not ruled out a returning to first-team action.
“I'm going to do something different than what I used to do, which was to be on the pitch,” Casillas is cited as saying by the report.
“I'll try to make a connection between the team and the club. The Coach told me he wanted me to stay with them, near the players, near the younger because there would be many changes, I will try to do my best to help my colleagues.”
Porto have already confirmed they want the Spaniard’s ‘long term’ future at the club and have already made him an offer to carry on after a theoretical retirement, although the details of that have not yet been disclosed.
Casillas is one of the most decorated players in Spain’s history, playing over 700 games for Madrid before joining Porto in 2015.
He won three Champions Leagues with the capital giants, as well as two European Championships and a World Cup in his 167 caps for La Roja.