Ryan has trained with the squad this week following a two-month stint out with an ankle injury.
"We continue to assess him every day," said Mauricio after training on Thursday, as he prepares the squad to face Watford on Saturday.
"He’s close to coming back to the team. We have another training session tomorrow and we’ll wait to see if he’s in a good way."
Otherwise, Jan Vertonghen (knee) and Clinton Njie (knee) remain sidelined.
IMPORTANT INFORMATION FOR FANS