"That is how ambitious he is".
Bayern also have selection headaches for the game in Spain.
"I think if (Bayern goalkeeper Manuel) Neuer had not been on such form we would have scored more goals".
It could have been worse for Bayern - Sergio Ramos had a goal ruled out late for offside.
Ronaldo scored twice as Real Madrid overturned a 1-0 half-time deficit to win 2-1 in the first leg of their Champions quarter-final at the Allianz Arena to take a huge step towards a record seventh consecutive semi-final.
Bayern played the last half an hour a man down after centre-back Javi Martinez was sent off for two fouls on Ronaldo within three minutes.
"We did well to earn the comeback", Ronaldo said. Marca claim the Welsh superstar is suffering from knock on his right foot, and Zinedine Zidane has opted to take no chances with one of his star forwards.
Neuer made two remarkable saves on shots by Ronaldo and Karim Benzema a few minutes apart toward the end of the match in Munich.
On Wednesday night, Ronaldo became the first player to have racked up 100 goals in European competitions.
Bayern should have been 2-0 up at the break, but Arturo Vidal, who headed the hosts into a first-half lead, skied a penalty.
Bayern Munich boss, Carlo Ancelotti has said his side was not lucky enough when they failed to utilize their opportunities to defeat Real Madrid at home in the Champions League quarter final first leg at Munich. I trained hard in order to be ok for this month and a half of competition.
'I am happy with his game and also with the performance of the whole team'.
"They could have killed it (the tie) by scoring another goal, but they didn't". The La Liga leaders then started attacking more frequently on Munich's defense and Ronaldo scored again in the 77th minute.
Zidane did not say whether he will rest Ronaldo for the team's away game at relegation-threatened Sporting Gijon tomorrow in the Spanish league.
The reigning champions went on to triumph 2-1, though their hero insisted the tie is far from over ahead of Tuesday's return.
Ancelotti hopes to have striker Robert Lewandowski, who missed the first leg with a bruised shoulder, and defender Mats Hummels, ankle, back for the return.
More than half of his strikes have come in the opening 45 minutes of games, with his one and only extra-time goal helping Real clinch the trophy against city rivals Atletico Madrid in 2014.