Becky James (Great Britain) breezed into the 1/8 finals in the women's track sprint with victory in the 1/16 race. She'll be joined in the next round by teammate Katy Marchant, who also won her head-to-head without the need for a run-off in the repecharges.
James had already set a new Olympic Record earlier in the evening when she qualified fastest for the first round.
The British rider started the evening well with the new record of 10.721, which bettered the time set by Victoria Pendleton at London 2012.
A surprise from the 1/16 round was that multiple world and Olympic champion Anna Meares (Australia) lost out in her race and was forced to contest a repechage later in proceedings.
The Australian got through the three-way run-off, but will have another race in her legs when the competition starts again on Monday August 15.
The women's track sprint concludes during the later track cycling session on Tuesday August 16.
More from the Olympics
Jason Kenny beats Callum Skinner to take Olympic sprint title
Elia Viviani wins omnium elimination race as mistake costs Mark Cavendish
Becky James beats Victoria Pendleton's Olympic Record in women's sprint qualifying
Result
Women’s sprint: 1/16 Final
Winners progress to 1/8 final; losers to repecharges
Becky James (GBR) bt Olga Ismayilova (AZE)
Katy Marchant (GBR) bt Monique Sullivan (CAN)
Lee Wai Sze (HKG) bt Virginie Cueff (FRA)
Elis Ligtlee (NED) bt Gong Jinjie (CHN)
Zhong Tianshi (CHN) bt Miriam Welte (GER)
Kristina Vogel (GER) bt Laurine Van Riessen (NED)
Natasha Hansen (NZL) bt Kate O’Brien (CAN)
Anastasiia Voinova (RUS) bt Stephanie Morton (AUS)
Simona Krupeckaite (LTU) bt Anna Meares (AUS)
Women’s sprint: 1/16 Final Repecharge
Anna Meares (AUS) bt Olga Ismayilova (AZE) and Laurine Van Rieseen (NED)
Miriam Welte (GER) bt Kate O’Brien (CAN) and Monique Sullivan (CAN)
Virginie Cueff (FRA) bt Stephanie Morton (AUS) and Jinjie Gong (CHN)
