NEW HAVEN, CT, USA - Play is scheduled to start a little earlier at the Connecticut Open presented by United Technologies today - because of the eclipse of the sun later on.
The moon will pass in front of the sun, obscuring it from view, meaning a loss of light and heat.
In some areas of the USA, it will be a total eclipse - but in Connecticut, it will be partial, covering around 70 per cent of the sun for a few minutes at around 2.45pm EST.
That is why the on-court action begins at 10am today - but Kristina Mladenovic is still a bit worried that the eclipse might interfere with her match.
Fortunately, three-time Connecticut Open champion Petra Kvitova was on hand to explain the astronomy to her tour rivals - including reigning title-holder Agnieszka Radwanska, Dominika Cibulkova, and Mladenovic herself.