The top three on the Official Golf World Ranking have been drawn together at Doral and Donald, who captured the WGC-Accenture Match Play title two weeks ago, is looking forward to the challenge.
"It is a nice feeling," said Donald. "Certainly you use that to your advantage, and that adds to your confidence level - that there's only two players ranked higher than me in the world right now, and that's pretty amazing to think about.
"It will be fun on Thursday and Friday, I think having Lee and Martin there, two Ryder Cup teammates, we get along very well. It will be exciting but fun, as well.
"Historically, I have not really contended at this event at Doral for some reason. But certainly the form is good, and there's no reason why I can't add to the Match Play event."
Donald also revealed his admiration for compatriot Westwood, who will be looking to reclaim top spot from Kaymer after the German overtook him with his run to the final in Arizona.
"Everyone has a lot of respect for Lee," he continued. "I think he carries himself well. He's a hard worker - he's probably the best ball-striker out there right now.
"I think anyone who goes through a dip like that where they lose confidence, start to question themselves and whether they are ever going to come back; and to have that fortitude and strength, I guess rededication to the game is pretty amazing. It's not easy to do - hats off to Lee for doing it."
As for 33 year old Donald, he puts his improved form down to an extended winter break.
"I think the decision I made to spend a little bit more of an off season working on a few things really panned out and worked out," he added. "It was necessary for me to take some time off this season just because I had had a long run of years where I had not really had a break. I just wanted to kind of experiment to see if it would make a difference.
"I think I had a total of 11 weeks off and I didn't touch a club for six of them. I was in the gym doing other stuff towards the game, but in terms of hitting balls and practicing, I didn't do anything for six weeks.
"It was nice to just get away from it, visit some family, go to England and spend some time with my family."