Real Madrid coach Ancelotti does not believe his future at the club depends on him winning a trophy this season and says: "I am here to stay".
Atletico Madrid, six points adrift of Barca in third, will look to rebound from last weekend's 2-0 reverse at Celta Vigo when they host Almeria.
"Modric's return to the group was the big news of the day during a training session", Real said on their website.
Cristiano Ronaldo netted one goal and set up another in his team's 2-0 win against German side Schalke 04.
Ronaldo ended a brief goalscoring slump to help holder Real Madrid beat Schalke 2-0 in the last 16 of the Champions League.
Ancelotti said Real were aiming to become the first team to retain the Champions League crown and will have defender Pepe fit for the game.
While PSG lost four players to injury on Saturday, Jose Mourinho's Chelsea players benefited from a rare weekend off with the team not involved in FA Cup action.
Ronaldo made a blistering start to the season and looked well on the way to breaking the record for La Liga goals in one campaign of 50 set by Messi in 2011-12.
Real Madrid needed goals from Francisco "Isco" Alarcon and Karim Benzema to beat a determined Deportivo La Coruna and ensure they remained the La Liga leaders.
Real kick off the weekend in the title race on Saturday afternoon after Sevilla open the weekend's affairs with a derby against struggling neighbors Cordoba.
A Spanish court has annulled permission granted by the Madrid city government to allow Real Madrid to remodel its Santiago Bernabeu stadium.