Chilean Cristobal Del Solar flirted with the lowest round in US PGA Tour history before settling for a share of the lead after Thursday's opening round of the Canadian Open.

Denmark's Thorbjorn Olesen and Del Solar each fired nine-under par 61 to seize the 18-hole lead at rain-softened TPC Toronto Osprey Valley.

Olesen, a back-nine starter, eagled the par-five 18th and birdied three of his last four holes -- from just inside 14 feet at seven and eight -- after only making the field as a Monday qualifier.

"I played great, but my putting was exceptional," the Dane said. "Don't think I missed any putts really out there. I definitely holed some long ones as well. It was nice to see everything go in."

Tour rookie Del Solar was 10-under through 16 holes but a bogey-par finish denied him a sh

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