The Serbian, who is seeking his 18th grand slam title, will face Colombia's Daniel Elahi Galan in the next round.
"Of course, I will make sure I don't make the same mistake twice," he added.
Several Flamengo officials and members of the coaching staff, including manager Domenec Torrent, have also been diagnosed with the virus. Torrent was replaced on the touchline at Allianz Parque by his assistant, Jordi Guerrero.
Willy Caballero replaced Kepa in the Chelsea goal, but had picked the ball out of his net three times by the 27th minute as Callum Robinson scored twice and Kyle Bartley made it 3-0.
Valladolid and Celta drew 1-1 with Sergi Guardiola's 66th minute penalty cancelling out Iago Aspas' 44th minute strike for Celta.
Zidane is likely to bring either Isco or Luka Modric into his starting 11 to replace Kroos, although the doubt remains whether he will use a 4-4-2 with a midfield diamond formation that helped Madrid beat Betis at the weekend, or the 4-3-3 he fielded away to Real Sociedad in his side's league opener.
World champion Xu Jiayu from Zhejiang clinched his second gold in the men's 100m backstroke in 52.60 seconds, after his 200m backstroke victory on Sunday.
PARIS, Sept. 27 (Xinhua) -- Italian teenager Jannick Sinner made his Roland-Garros debut with an impressive 7-5, 6-0, 6-3 win over 11th seed David Goffin on Sunday, while women's top seed Simona Halep celebrated her 29th birthday with a straight-set victory over Spaniard Sara Sorribes Tormo.
Shanghai led by as many as 35 points in the final period.
Baena, the world number 101, battled to a 7-5, 6-7, 6-3, 3-6, 8-6 victory to reach the third round of a Grand Slam for the first time in his career.
"If we don't have advantage on strength, we should be much more confident than our opponents, and showing a stronger will to win," he added.