Ernesto Valverde's team came out happy to control and impose themselves on a despairing Malaga side in the second half, with the visitors content to take their foot off the pedal somewhat.
Barca will benefit from a fresh Messi against the Premier League champions at Camp Nou. And the visitors were ahead after 34 minutes when Modric intercepted a pass from Anaitz Arbilla before playing a sumptuous through-ball for Ronaldo to drill home at the near post.
Childhood sweethearts Messi and Roccuzzo married in June this year in a lavish ceremony in their hometown of Rosario.
After withdrawing from the squad to face Malaga, Argentine forward Lionel Messi has announced the arrival of his third child Ciro Messi on Saturday. "He showed it again today, he played really well".
And Dembele's assist for the cheekiest of cheeky Coutinho finishes crowned a brilliant performance.
"Every game is important and not winning would mean a lot more pressure going into the next game". How Roberto performs against Barca's much vaunted attack could be key in keeping the score at least respectable.
Messi, of course, needs no introduction. What happened in Las Palmas, when we couldn't win, has to serve as a warning for us.
In a calm night of football, Barcelona comfortably beat Malaga 0-2. Youssef En-Nesyri was off target with two of their best openings.
The Segunda Division beckons for a side that was minutes from the Champions League semi's only five-years ago.
Madrid remain 15 points back of Barca, who lead Atletico Madrid by 11 points in the title race (Atleti host ninth-place Celta Vigo on Sunday).
And he can also create, as we saw with the second goal.
Lionel Messi will miss Barcelona's clash with Malaga on Saturday evening due to personal reasons.
Chievo goalkeeper Stefano Sorrentino also wore a glove with the words "ciao Davide" on the wrist strap. Suffice to say people were now expecting a return on that enormous price tag, having seen precious little on the pitch in the few games he had managed to play. I've never been a player to kick out.
Rodrigo Moreno netted his 11th and 12th league goals. Barcelona were incredibly superior to Malaga even without Leo Messi. Consider that streak broken. There is no mention of any injury or anything that is likely to keep him out of the Chelsea game.