Seamus Power and Padraig Harrington will both hope to build on their bright starts to the Byron Nelson Classic in Texas.
Power is two off the lead following a 7-under par opening round of 65, while Harrington is just a shot worse off.
Americans Jordan Spieth and J-J Spaun share top spot on 9 under.
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Paul Dunne tees off his penultimate round at the British Masters at 12.15.
The 2017 winner is 3-under par, and four adrift of leading trio Richard Bland, Robert MacIntyre and Callum Hill.