Munich, Germany (My Sportsbook) - Martin Kaymer drained a long birdie putt at the 18th hole on Saturday to finish off a five-under 67 and extend his lead to six shots at the BMW International Open.

Kaymer, the reigning European Tour Rookie of the Year, ended three rounds at 18-under-par 198 to finish four strokes off the tournament's 54-hole scoring record.

Seeking his second win of the season, the 23-year-old German will enter Sunday with a six-shot lead on Charl Schwartzel. Kaymer also held a six-shot lead after 54 holes on the way to winning the Abu Dhabi Golf Championship in January, his first career victory.

"I'm in the same situation, so I know how it feels," said Kaymer. "So I'm just looking forward. It's nice to have a chance to win in your own country and I hope that there will be a lot of support tomorrow."

Schwartzel started the round tied for ninth place and fired a six-under 66 to move into a distant second at 12-under 204.

Paul Casey, Ross Fisher and Thomas Levet all shot rounds of five-under 67 and were tied with Benn Barham (69) for third place at 11-under 205. David Lynn (66), Anders Hansen (67), Tino Schuster (69) and Francois Delamontagne (70) were another shot further back at 10-under 206.

Only seven more players at Golfclub Munchen Eichenried were within 10 shots of Kaymer's lead -- among them Retief Goosen, who shot a third-consecutive 69 and was at nine-under 207.

Kaymer, after shooting a 63 on Friday to take the lead, didn't let up on Saturday.

After starting the third round with five straight pars, he made four birdies in a six-hole stretch around the turn to reach 17-under par heading to the 12th tee.

Several players -- Schwartzel and Schuster among them -- stepped up to challenge Kaymer, with Schuster climbing as close as four shots after an eagle at No. 11.

But Kaymer played steady with the lead, making six straight pars until his closing birdie at the 18th. He walked dutifully toward the hole after draining the 25-footer.

Kaymer will be looking to become the first German to win this tournament -- something not even Hall of Fame great Bernhard Langer was able to accomplish. Langer played in the same threesome with Kaymer the first two rounds and was 15 shots off his fellow countryman's lead heading into Sunday.

"It's always nice to have a big challenge," said Kaymer. "But there are at least seven or eight other guys that what to win as well. So I'm just going to stick to my game plan tomorrow and play aggressive -- but still smart -- and we'll see where I end up."