Team GB were unable to claim their first medal of the Rio 2016 Olympic Games after swimmers Hannah Miley and James Guy and cyclist Chris Froome failed to make the podium on day one in Brazil. Guy finished sixth in the men's 400m freestyle, while Tour de France champion Froome failed to feature in the mix up for the medals as he came home in 12th in the road race.
Miley looked destined to end break her Olympic duck before being overhaul by Spain's Mireia Belmonte for the bronze medal. Guy meanwhile led with one lap remaining of the men's 400m freestyle but fell away and eventually finish sixth. Max Litchfield meanwhile finished fourth in the 400m individual medley.
Adam Peaty is however on course for gold after he smashed his own world record in the men's 100m breaststroke, before swimming the second fastest time in history to qualify fastest for the final. Ross Murdoch missed out on joining the world champion in the final however, after being edged out in the semi-final.
Earlier on day one, Britain's five-strong road race team were expected to compete for medals, particularly with three-time yellow jersey winner Froome and Commonwealth Games road race champion Geraint Thomas in toe. The Welshman was in the main chasing pack but crashed on the final descent, as Belgium's Greg van Avermaet sprinted to victory. Thomas and Froome finished 11th and 12th respectively.
Elsewhere, eager to build on their bronze medal from London, Team GB's women beat rivals Australia 2-1 in their Group B opener in the hockey competition in a thrilling clash at the Olympic Hockey Centre. Lily Owsley reacted first to put GB ahead at half-time, before Georgina Morgan levelled from a penalty corner for Australia.
But Britain exacted revenge from their defeat in the Champions Trophy to the Hockeyroos when Alex Danson finished superbly with the reverse shot which flew into the roof of the net. Craig Keegan's side held on to register a moral-boosting win which sets them up perfectly for the remainder of the competition. Meanwhile, their male counterparts were overwhelmed by Belgium in their first match, losing 4-1.
In the boxing competition, Britain got off to the perfect start with a clean sweep of first round victories on day one. In the afternoon session, Gala Yafai set up a clash with light-fly world champion Johanys Argilagos after a unanimous win over Simplica Fotsala of Cameroon. Yafai lost harrowingly to the Cuban at the World Series of Boxing final earlier in the year.
There was success also for Wales' Joe Cordina, who edged the energetic Charly Coronel 2-1 over the three-round contest. Finally, London's Lawrence Okolie marked remarkable route from obesity to the Olympic Games by beating Igor Jakubowski, to book clash with America's Cam F Awesome.
Though flag bearer Andy Murray is not in action until Sunday [7 August], Britain enjoyed an encouraging start to attempt to add to their two tennis medals from London 2012. Heather Watson - fresh from claiming her Wimbledon mixed doubles crown - claimed two victories, the first after beating Peng Shuai in three sets in the singles competition.
The Guernsey-born player then linked up with British number one Johanna Konta to oust Serbia's Jelena Jankovic and Aleksandra Krunic. Kyle Edmund also swept into the second round after overcoming Jordan Thompson in straight sets, but Dom Inglot and Colin Fleming were dumped out of the men's doubles by Santiago Gonzalez and Miguel-Angel Reyes-Varela of Mexico.
GB women marked rugby sevens' debut at the Olympics by securing qualification for the quarter-finals with routine wins over hosts Brazil and Japan at the Deodoro Stadium. The team made up a handful of England's World Cup winning squad from 2014, strolled to victory in their opening two pool matches ahead of a clash with third seeds Canada on Sunday which will help determine their last eight opponents.
William Fox-Pitt sits top of the individual eventing after the first day of dressage in the equestrian competition. The 47-year-old was placed into an induced coma 10 months ago and despite only returning to competition in April leads Britain's attempts to win a first eventing gold since 1972.
Britain's rowers had to overcome adversity of a different kind as cross-winds played havoc at the Lagoa Stadium. Katherine Grainger bemoaned the worst conditions she had experienced in Games history as she and Vicky Thornley finished second in the opening round of heats in the double sculls.
Alan Campbell, the bronze medallist from London 2012, enjoyed comfortable passage in the single sculls as he won his heat while the lightweight fours including fellow Northern Ireland rower Peter Chambers also secured passage. Alan Sinclair and Stewart Innes are into the semi-finals of the coxless pairs after they also finished second in their heat.