Barcelona and Atletico Madrid were also among a slew of top-flight clubs joining La Liga in expressing their condolences for Francis.
Flick said it was one of those comebacks that nobody forgets easily, adding it was not easy to win after Borja Iglesias netted a hat-trick to give Celta a 3-1 lead.
Mbappe will miss Madrid's next La Liga match against Athletic Bilbao on Sunday, as Ancelotti's side try to overhaul leaders Barcelona.
Julian Alvarez, who coolly slotted home two penalties on the night, now boasts 26 goals in all competitions—14 in La Liga. But according to his coach, there’s still room to grow.
It was his first red card after joining the Spanish and European champions last summer.
Barcelona extended their advantage in the Spanish top flight with a 1-0 win at Leganes on Saturday, completing a 12-match unbeaten run and moving seven points clear of second-placed Real Madrid.
Second-placed champions Madrid face Alaves on Sunday and have to play catch-up after Hansi Flick's side scraped their way to a narrow but vital win on the road.
LaLiga side Real Valladolid said they will discipline two of their players after they almost came to blows on their bench during Sunday's 4-0 home loss against Getafe.
The final stretch of this Spanish football season promises drama, tension, and perhaps a few surprises. One thing is certain: La Liga is set for a thrilling conclusion.
"This is a heavy blow, we have to bounce back. Losing at this point in the season is tough because everyone is on form and we didn't do well in this game," the Italian told reporters.
Modric, Ballon d'Or winner in 2018, scored Real's opener in the victory, controlling a looping clearance from a corner with his chest before unleashing a sublime long-range volley which arrowed into the top corner in the 41st minute.
After Atletico Madrid beat Valencia 3-0 to temporarily take pole position, the Catalans replaced them with a narrow victory on the road and sit one point ahead of the Rojiblancos.
Lewandowski scored his 20th goal of the season with a 28th-minute penalty that went in off the post.
Barca have the opportunity to return to the top when they host sixth-placed Rayo Vallecano at the Olympic Stadium on Monday, after both their main rivals dropped points on Saturday.
Hansi Flick's Barca climbed within two points of Los Blancos and moved one behind Atletico to crank up the tension in the title race.
Julian Alvarez dinked home a controversial first half penalty for Atletico but Mbappe was in the right place at the right time to bundle home early in the second half on his first appearance in the tense derby clash.
Spanish La Liga club Real Betis launched a new kit made out of an invasive algae on Thursday to raise awareness of an ecological crisis on the Andalucian coast.
Los Blancos were beaten 1-0 at relegation-battling Espanyol on Saturday and subsequently sent a furious letter to the Spanish football federation blasting the country's refereeing as "rigged" and "completely discredited".
Barcelona sit third in the standings with 42 points, three behind second-placed Atletico Madrid and seven adrift of leaders Real Madrid.
