The Master was looking at him. He glared at him. He was sure that he could keep beating the Doctor. He was determined to not give up on fighting him "Not going to fight me back. Or are you too much of a coward'
He hissed . He grabbed him by his jacket again.

"YOu cant help me," He snarled "I don't want your help." He punched him and tried to break his ribs. He wasn't going to let him die or regenrate. But he did want to hurt him. He dug his nails into the Doctor's arm.
He knew the Doctor was not a man of violence and didn't give up easy.