Woods - dedicated win to father. (Getty Images)

Tiger Woods had tears in his eyes tonight when he won a fourth Masters at Augusta. They were not all tears of joy.

Woods dedicated his play-off victory over fellow American Chris DiMarco to his ill father, Earl.

"He was not healthy enough to come out (to the course) today," said the 29-year-old, now with nine majors to his name and back as world number one.

Turning to the TV cameras, he said: "This one's for you pop."

Woods added: "The troubles he has gone through he was not looking good and he is having a hard time right now. But there's a big bear-hug waiting for him and I dedicate this to him."

Woods senior suffered a heart attack a few years ago and has recently been receiving treatment for cancer.