Pardraig Harrington got his BMW PGA Championship challenge off to a solid start after scoring a three-under 69 on Wentworth's famous West Course.
The Irishman, 43, entered the tournament at Wentworth still looking for his first win on the European and PGA Tour this season but kicked off with two consecutive birdies on the fourth and fifth as the fantastic early-morning conditions helped him on his way.
A bogey on the par-four seventh was quickly eradicated by a birdie at the eighth as Harrington went out in a two-under 33.
As conditions started to deteriorate, Harrington found himself struggling to make bogey at the 184 yard par-three 10th but soon responded with a further two birdies on the par-five 12th and par-four 13th to go three under for the day.
That left him tied for eighth, six shots off insatiable leader Thomas Bjorn, who was busy chasing the course record in the group behind Harrington.
AS torrential rain poured onto the pristine English course, the ability to control the ball became harder and Harrington paid for it on the 16th with a bogey five.
However, Harrington's round was nicely summed up on the devilish 18th, as the notorious hole gave up a birdie three to give Harrington a fantastic position going into the second round on Friday.
At the time of publication, Harrington is tied eighth, seven shots off leader Thomas Bjorn on 10-under.