OAKVILLE, Ontario — Dustin Johnson started and finished the day tied with Luke List for the Canadian Open lead. The U.S. Open champion had to make up a lot of ground to do it.

Johnson had a double bogey and two bogeys on his first holes Friday in windy conditions at sun-baked Glen Abbey. He rebounded with six birdies and had a late bogey in a 1-under 71.

List also shot a 71, birdieing the par-5 16th and 18th after making three bogeys in a four-hole stretch early on the back nine.

Canadian amateur Jared du Toit, former Arizona State teammate Jon Rahm and Kelly Kraft were a stroke back, also each shooting 71.

Du Toit made the turn tied for the lead at 7 under, then had a triple-bogey 8 on No. 2 and a bogey on No. 5. The Sun Devils senior birdied the next three holes and closed with a par.

Top-ranked defending champion Jason Day was 1 over, following his opening 69 with a 76.

SENIOR BRITISH OPEN: Joe Durant birdied the par-4 18th hole for a 3-under 68 and a share of the lead at Carnoustie, Scotland, with Kohki Idoki.

The 52-year-old Durant birdied three of the first five holes on the back nine, the second two on the par-5 12th and 14th at Carnoustie Golf Links in 10-15 mph wind with some light rain.

Durant teamed with Billy Andrade to win the 2015 Legends of Golf for his lone PGA Tour Champions title. The four-time PGA Tour winner has five top-10 finishes this season, including a runner-up finish to Bernhard Langer in the major Constellation Senior Players in June.

Idoki, the 54-year-old Japanese player who won the 2013 Senior PGA Championship, had a 67 to match Durant at 7-under 137. He rebounded from a bogey on the par-4 17th with a chip-in birdie on 18.

LPGA: Lexi Thompson and Cristie Kerr helped the United States rebound in the UL International Crown at Gurnee, Illinois, and Melissa Reid had a gutsy effort for England after her ill partner was sidelined.

Thompson and Kerr routed Thailand’s Ariya Jutanugarn and Porani Chutichai 4 and 3 for the Americans’ first two points after they were shut out in the first session of the LPGA Tour event. The U.S. almost got a sweep, but Gerina Piller and Stacy Lewis each missed a birdie putt on 18 and had to settle for a single point against Moriya Jutanugarn and Pornanong Phatlum.