• Callum Skinner, Philip Hindes and Jason Kenny win gold at veledrome.
  • Joshua Buatsi leads Team GB fightback in boxing.
  • Andy Murray and Heather Watson cruise into mixed doubles quarter-final.

Team GB's cyclists won a fourth gold medal on day six of Rio 2016 after Katherine Grainger cemented her place in history by becoming Britain's most decorated female Olympian of all-time.

Callum Skinner, Philip Hindes and Jason Kenny secured the perfect start to Team GB's cycling campaign at the velodrome as they defeated New Zealand with a superb time of 42.440.

The victory moves Kenny level with Sir Bradley Wiggins on four gold medals, with two more also in his sights this summer with keirin and individual sprint events to follow.

Callum Skinner, Philip Hindes and Jason Kenny
More gold success for British cycling Getty

Earlier in the day, Grainer took her personal haul to five after winning silver alongside Vicky Thornley in the women's doubles sculls final.

The duo looked set to take gold before being caught by Poland with only 100m left to go but it did little to dampen their celebrations. There was disappointment for Team GB in the men's quadruple sculls, however, as Jack Beaumont, Sam Townsend, Angus Groom and Peter Lambert finished fifth as Germany defended their Olympic title with Australia and Estonia finishing second and third respectively.

There was more British success however for David Florence and Richard Hounslow, who retained their Olympic silver medal in the men's C-2 canoe slalom final.

Team GB's boxing hopefuls have endured a disappointing start to Rio 2016 with five fighters suffering elimination this week. There was an upturn in fortunes on Thursday (11 August), however, epitomised by a sublime performance from Londoner Joshua Buatsi.

The 23-year-old was faced with formidable opposition in third seed Elshod Rasulov but sent out a huge statement of intent with a devastating knockout to book his place in the quarter-finals of the men's light heavyweight competition.

Pat McCormack also secured victory in Rio for Team GB, comfortably seeing off Ablaikhan Zhussupov of Kazakhstan in his light-welterweight bout.

In tennis, Andy Murray was given a minor scare from Italy's Fabio Fognini but managed to hold off the fightback to book his place in the men's singles quarter-finals. Just hours later, he was back out on court with mixed doubles partner Heather Watson.

Shortly after completing his warm down after his demanding singles victory, the Wimbledon champion was notified that Romania duo Monica Niculescu and Florin Mergea has withdrawn. Watson meanwhile had been in the crowd watching Johanna Konta in her singles match against Angelique Kerber but the late call didn't appear to phase either as they secured a routine 6-3 6-3 win over Spain's David Ferrer and Carla Suarez Navarro to advance into the quarter-finals.