Aryna Sabalenka is through to the quarterfinals of the National Bank Open in Toronto after defeating Katie Boulter in straight sets.
Britain's Katie Boulter won the Rothesay Open in Nottingham for the second successive year on Sunday.
Katie Boulter put in a British number one display by beating Emma Raducanu in the battle of Britain at the Nottingham Open to return to the final.
Harriet Dart was critical of a line call in her ill-tempered defeat to British team-mate Katie Boulter at the Nottingham Open.
British number one Katie Boulter was eliminated from the Miami Open by Victoria Azarenka, who clinched a straight-sets victory to advance to the quarter-finals.
The British number one Katie Boulter battled back from a set down to defeat Ukrainian Marta Kostyuk 5-7 6-2 6-2 in the final of the San Diego Open.