Thursday's action at the Houston Open has again been called off without any matches completed due to persistent rain in the area.

It is the second day in a row without a match being completed after Wednesday's play only made it through one set.

Max Purcell took the first set of his match against Daniel Altmaier on Wednesday, before Altmaier came back to win the second set on Thursday, and they will hope to complete the match on Friday when they resume with Purcell leading 6-4 3-6 4-3.

John Isner will likely have a do-or-die tie-breaker as soon as his match with Gijs Brouwer resumes, as he trails 6-4 5-6 with the Dutch competitor on serve.

The only other match underway is locked at 4-4 between Denis Kudla and J.J. Wolf.