The reason why Novak Djokovic was seen wearing a pair of big blue gloves during his Miami Open match has been revealed.
On Thursday, the Serbian was in action at the Miami Open as he took on American Sebastian Korda in the quarter-finals.
The 37-year-old, now coached by Andy Murray, had to dig deep to earn a 6-3, 7-6 (7-4), straight sets victory, setting up a semi-final clash against Grigor Dimitrov.
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In between games, Djokovic was seen wearing what looked like a pair of blue oven gloves as he sat on his bench.
While some fans were left confused, tennis legend Martina Navratilova was on hand to explain everything.
She said on Sky Sports Tennis: "They've had this years ago, it can lower your body temperature in like 30 seconds.
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"It cools down the blood supply. I don't know why more people haven't been using them."
She continued: "Novak is ahead of everybody when it comes to technology. It's magic and I don't know why tournaments don't have them for all the players."
Reflecting on his performance after the match, the 24-time Grand Slam winner said: "I'm feeling very relieved that I won in straight sets, to be quite frank. The highlight of the match for sure was my first serve. I've been serving really well and today was my best serving performance [of the Miami Open].
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"I was quite nervous because you never know what comes from Korda. He's so aggressive and so talented. I was on my back foot and trying in some moments to passively wait for his error instead of trying to dictate the tempo from the baseline."
Djokovic continued: "I managed to break back and got myself in a winning position. Very tense match but a great performance."
Djokovic will now take on Dimitrov on Friday, with the winner set to face either third seed Taylor Fritz or rising star Jakub Mensik in the final.
Topics: Tennis, Novak Djokovic
Marcus Chan