09:56 CET - Canada have taken a 1-0 lead in their United Cup tie against China, with Victoria Mboko coming from a set down to defeat Lin Zhu 2-6, 6-2, 6-0.

09:19 CET - Frances Tiafoe is the first man through at the Brisbane International after a routine 6-2, 6-2 win over Aleksandar Vukic, while Marie Bouzkova has seen off Jaqueline Cristian in straight sets, 6-4, 6-3.

07:30 CET - Good morning and welcome to our first Tennis Tracker of the year as we bring you all the latest scores and updates from the United Cup and Brisbane International!

There's been plenty of overnight action down under, with Alexander Zverev and Naomi Osaka securing wins over Tallon Griekspoor and Katie Swan, respectively, at the United Cup.

Meanwhile, in Brisbane, former Australian Open champion Sofia Kenin is through to the second round after a battling 6-4, 4-6, 6-3 victory over Elena Gabriela Ruse.

McCartney Kessler, Anastasia Potapova and Ajla Tomljanovic have also made winning starts at the WTA 500 event.

Keep track of the full [lslink-league cms-href="https://www.flashscore.com/match/tennis/great-britain-QFVCO6cG/japan-ELukFeNa/standings/standings/overall/?mid=0zTx7qpT" sport-id="2" tournament-template-id="rT3Jjzo7" tournament-id="8zAOSDxf" tournament-stage-id="Ig9TuK2S" season-id="185" target="summary"]United Cup[/lslink-league], [lslink-league cms-href="https://www.flashscore.com/match/tennis/tiafoe-frances-AHDLJaph/vukic-aleksandar-O2CmIROi/draw/?mid=h0EyhgH8" sport-id="2" tournament-template-id="QqLCC3il" tournament-id="UwQdP5N5" tournament-stage-id="QHeC8kom" season-id="185" target="summary"]Brisbane[/lslink-league] (ATP) and [lslink-league cms-href="https://www.flashscore.com/match/tennis/jacquemot-elsa-8Gag74BD/tomljanovic-ajla-hAR7VtG4/draw/?mid=YgGO3mCk" sport-id="2" tournament-template-id="vVcwNP6f" tournament-id="pbILF78a" tournament-stage-id="UZLWvHJP" season-id="185" target="summary"]Brisbane[/lslink-league] (WTA) schedules via the links.