The France international has made 13 appearances for the Reds this term, although he is yet to play under the German during his tenure at Old Trafford.
Pogba suffered a groin injury, while on international duty with France in November, and spent time making use of the warm weather conditions in Dubai to rehabilitate.
Ralf was in touch with Pogba over the phone during his time out there and the pair have also been in regular contact since our no.6 returned to the country prior to Christmas.
However, the 63-year-old revealed that Paul is still around a month away from being able to progress from individual work to train with his team-mates again at Carrington.