Danielle Collins is doing her utmost to go out with a bang in her final season on the WTA Tour as she looks to add another title to her haul after reaching the semi-finals of the Charleston Open.

World number 22 Collins, who won her first Masters 1000 title at the Miami Open last month, beat Belgian Elise Mertens 6-3 6-4 in Friday's quarter-finals to claim her 11th successive win on the tour.