Ryder Cup captains Keegan Bradley and Luke Donald have vowed to put their friendship to the side as they battle it out for glory this week. United States captain Bradley and his European counterpart are good friends, having spent a lot of time together off the course over the last 14 years. “For me, there’s not many people I like more in the golf world than Luke Donald,” Bradley said. “I got to go out and play with Luke Donald who’s the best player in the world. I loved hanging out and having a drink with Luke Donald.