The 29-year-old Spaniard, a key cog in Luis Enrique's midfield machine, has been sidelined for over a month by a nagging groin injury picked up during PSG's gritty 2-1 Champions League triumph over Barcelona on October 1.
That setback forced him to sit out four Ligue 1 outings, including recent wins that have the Parisiens purring with back-to-back victories across all fronts.
Ruiz also missed Spain's dominant October World Cup qualifying double-header, where La Roja dismantled Georgia 2-0 and Bulgaria 4-0 to sit pretty atop Group E.
"He's doing fine now," Enrique said ahead of last weekend's fixture, hinting at the midfielder's steady progress. "We'll make a late call on him, but no one's rushing anyone back."
While club sources confirm Ruiz has rejoined the group sessions on Tuesday, alongside compatriot Joao Neves, his spot in the lineup for the Lorient clash remains up in the air. Enrique has stressed caution with his prized asset, who has become indispensable for breaking lines and dictating tempo in PSG's fluid 4-3-3 setup.
The Parisiens, unbeaten in Ligue 1 and chasing a record-extending title charge, will relish any edge against a Lorient side scrapping to climb from the relegation mire. If Ruiz features, expect him to slot straight into that engine room, feeding bullets to the likes of Ousmane Dembele and Goncalo Ramos up top.
Ousmane Dembele has insisted he will be ready for Paris Saint-Germain's Champions League final against Arsenal after concerns over his fitness earlier this week.
Paris Saint-Germain have confirmed that Ousmane Dembele is receiving treatment for a muscle strain in his right calf after being forced off during Sunday's 2-1 defeat to Paris FC.
Luis Enrique has delivered a blunt assessment of his side's performance after Paris Saint-Germain ended their Ligue 1 campaign with a disappointing 2-1 defeat to local rivals Paris FC.
France have confirmed their 2026 World Cup squad, with Bayern Munich duo Dayot Upamecano and Michael Olise both included in Didier Deschamps' final selection as Les Bleus prepare for another major tournament challenge.
