(CNN) -- USPGA champion Martin Kaymer birdied the last two holes of his third round on Saturday to take a one-shot lead at the KLM Open in the Netherlands.
The European Ryder Cup player sank a 10-foot putt at the 17th and then hit a recovery from sand on the par five for a 66 and a 54-hole, 10-under par total of 200 to overtake Paraguay's Fabrizio Zanotti and Swede Christian Nilsson, who are tied for second place.
The forecast is for heavy rain on Sunday and Kaymer's caddie Craig Connolly told him on the 16th that it was important to establish a lead.
"He said maybe we should be more aggressive and I definitely was on the 17th," said Kaymer.
"Then I made one of the best up and downs this week. That was a difficult one with the hump in the green.
"The Ryder Cup was the main goal for this year, but once I reached that I made another one - to win The Order of Merit - and so every tournament is important."
Francesco Molinari and Ross Fisher, the other two Ryder Cup debutants in the field, scored 67 and 68 respectively to be four under and three under.
In the BMW Championship in Lemont, American Ryan Moore held a one-shot lead going into the final round.
Moore had only one mistake on Saturday in a round of 5-under 66, finishing the day 8 under par, giving him the lead over Dustin Johnson, Matt Kuchar and Charlie Wi going into a final round that should be wide open.
The final round could be the last one on the PGA Tour for Tiger Woods this year.
He shot a 3-under 68, but remains some seven shots behind where he needs to finish to advance in the PGA Tour Playoffs for the FedExCup.
Woods will play on Sunday with Phil Mickelson, the first time they have been paired together all year.