Britons Kyle Edmund, Dan Evans and Heather Watson lose to qualifiers in the first round in Miami, while Aljaz Bedene retires in his match.
The Miami Open first-round match between Tommy Haas and Jiri Vesely is briefly interrupted by an unusual intrusion.
Petra Kvitova speaks of her determination to return to tennis following a knife attack at her home in December.
Britain's Aljaz Bedene comes through the first round of qualifying at the Miami Open but compatriots Naomi Broady and Katie Swan are out.
Audio & Video
World number one Serena Williams challenges two strangers to an impromptu match during an evening walk, asking: "Can I play the winner?"
Tom Fordyce sees the world's ninth and 17th-ranked players defy age and injury to produce an Australian Open contest to number among the greatest ever.
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This week's sport on the BBC includes international football, BBL Championship basketball and the return of Formula 1.
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