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28 March 2016, 06:27 | Updated: 28 March 2016, 06:28
Jamie Murray is the new doubles world number one.
The Scot will become the first British player to be officially ranked as number one in the world despite being knocked out of the Miami Open in the first round.
The current leading men's doubles player, Marcelo Melo - playing alongside Ivan Dodig - lost in the second round of the competition on Sunday.
Last year, the 32-year-old made the semi-finals of the tournament, so the result means he will lose more ranking points than Murray - who was knocked out in round two last time.
Murray, 30, was beaten in the first round of this year's Miami Open with partner Bruno Soares - his 63rd partner in 13 years.
However, when the rankings are updated on April 4 he will have five points more than Melo.
Murray suspected his chance of getting to number one might have gone, so was thrilled to hear Sunday's news.
He wrote on Instagram: "Last night I went to bed wondering if that was the closest I would ever get. Today driving in the car my phone started to go crazy. #1''
Proud mother Judy Murray referenced sons Jamie and Andy's world rankings in doubles and singles, writing on Twitter: "No.1 is No.1. No.2 is No.2. @ATPWorldTour Think il have a fizz.''
In conversation with Australian player Casey Dellacqua, Judy Murray added of Jamie's feat: ``so happy for him Case. He's such a good kid''
Annabel Croft, the former top British women's player, wrote: ``Congrats to @jamie_murray on becoming first British men's world number 1 - fantastic!''
Former Wimbledon singles winner and four-time grand slam women's doubles winner Virginia Wade was ranked first in the women's doubles ratings - but the current official rankings were not brought in until 1975.