Charley Hull and partner Michael Brennan were one of two teams to set a new scoring record at the Grant Thornton Invitational, posting a 17-under 55 on day one of the mixed-team event.

Lexi Thompson and Wyndham Clark are tied for the lead after also carding a 55 opening round, both teams making only three pars in the scramble format.

Hull and Brennan at one stage went 13 straight holes with a birdie or an eagle, but had to settle for pars on the 16th and 18th holes.

Brennan, who started the year on the PGA Tour of Americas and won the Bank of Utah Championship on an exemption, was filling in for Daniel Berger who was originally due to partner Hull.

Thompson and Clark made birdie or eagle on nine of the last 10 holes, with the only exception being the par-three 16th.

The 55 recorded by

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