Victoria Azarenka battles to keep hopes of fourth Miami Open title alive

Victoria Azarenka kept her hopes of a fourth Miami Open title alive as she reached the semi-finals with a hard-earned victory over Yulia Putintseva.

The number 27 seed, a winner here in 2009, 2011 and 2016, laboured for just under three hours as she battled past her Kazakhstani opponent 7-6 (4) 1-6 6-3.

The 34-year-old saved three set points at 5-4 down in the opening set, then failed to convert two of her own before she held her nerve in the tie-break with some decisive forehands.