Live text and radio commentary as Andy Murray takes on Gregor Dimitrov for a place in the Australian Open quarter-finals.
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Jose Mourinho is "ashamed" by the loss to Bradford City, while Manchester City also lose on a day of shocks in the FA Cup.
Maria Sharapova will face Eugenie Bouchard, while Rafael Nadal is also through to the Australian Open quarter-finals.
Wales and British and Irish Lions prop Adam Jones tells the Sunday Times newspaper he has retired from international rugby.
New England Patriots coach Bill Belichick says his side followed "every rule to the letter" in the row over under-inflated balls.
Chelsea's defeat by Bradford was the biggest in FA Cup history, says Robbie Fowler - plus more reaction to a day of cup shocks.
Mario Balotelli has not been good enough in training to play for Liverpool at the moment, according to Brendan Rodgers.
New Zealand win the one-day series against Sri Lanka with a match still to play after going 4-1 up with a 120-run victory.
Bradford City's 4-2 comeback win over Premier League leaders Chelsea is hailed by one of the Bantams' goalscorers.
Hopes of a home player in the Australian Open men's quarter-finals rest with Nick Kyrgios after defeat for Bernard Tomic.
Tom Wood and Geoff Parling both suffer injuries before England's Six Nations opener against Wales on 6 February.
Juan Imhoff scores twice as Racing Metro humiliate Northampton, but Saints still reach the Champions Cup quarter-finals.
Manchester City boss Manuel Pellegrini denies a week-long training camp in Abu Dhabi is the reason for their FA Cup loss.
Villarreal defender Gabriel Paulista is set to join Arsenal with striker Joel Campbell moving the other way on loan.
Hurricane Fly will bid for a record fifth Irish Champion Hurdle as he faces old rival Jezki at Leopardstown on Sunday (14:45 GMT).
Britain's Elise Christie wins gold in the 500m and 1500m at the Short Track Speed Skating European Championships in the Netherlands.
Gareth Bale's late penalty ensures leaders Real Madrid overcome Cristiano Ronaldo's dismissal to beat Cordoba.
Neymar and Lionel Messi both score twice as Barcelona beat Elche to keep pace with La Liga leaders Real Madrid.
Reigning European champions Toulon overpower battling Scarlets in Pool 3 to continue their title defence.
Ulster centre Darren Cave's try hat-trick ensures Leicester fail to reach the European Champions Cup knockout stages.
A draw in Coventry leaves Wasps facing an anxious wait to see if they will reach the European Champions Cup quarter-finals.
Harlequins hammer Castres 47-19 to secure a bonus point win, but finish third in European Champions Cup Pool Two.
Cameroon and Guinea play out a draw that sees Africa Cup of Nations Group D exactly level going into the final games.
Inverness inflict Hamilton's fourth loss in a row as Martin Canning's first game in permanent charge ends in frustration.
World indoor champion Richard Kilty is disqualified on his indoor comeback at the Glasgow International Match.
News By Sport
Russia's athletics head coach Valentin Maslakov has resigned following the doping scandal in his country.
Amir Khan holds talks with Manny Pacquiao over a potential fight, but Floyd Mayweather remains Pacquiao's priority.
Mohammad Amir could return to first-class cricket next month if the ICC relaxes the Pakistani's five-year spot-fixing ban.
England's Alex Dowsett postpones his attempt to break the hour record after a slow start to his recovery from a broken collarbone.
Invictus Games competitor Corie Mapp wins gold for Great Britain in the first ever Para bobsleigh World Cup race.
Watch FA Cup Rewind, follow reaction to Saturday's drama, plus tell us a time when the team you play in has defied the odds.
Fernando Alonso will be the first man to test the new McLaren car as the team begin their engine partnership with Honda.
South African Branden Grace wins the Qatar Masters in Doha by one shot from Scotsman Marc Warren.
Hennessy winner Many Clouds follows up with victory in the Betbright Cup at Cheltenham on Festival Trials Day.
Judd Trump says an Olympic gold medal win would be a better achievement than triumphing at the World Championship.
Wigan Warriors winger Joe Burgess will join NRL side Sydney Roosters at the end of the 2015 Super League season.
Ospreys end their European Champions Cup campaign with defeat as a last-minute penalty try gives Treviso a shock win in Italy.
The world governing body of snooker has submitted a bid to have the sport included at the 2020 Olympics in Tokyo.
Drug cheats in sport face a minimum four-year ban - up from two years - under new rules which came into effect from 1 January.
Grigor Dimitrov expects a tougher test from Andy Murray at the Australian Open than when he ended his Wimbledon reign.
Great Britain's Laura Deas claims her second medal of the skeleton World Cup season with bronze in St Moritz.
FA Cup shocks
Video & Audio
Features & Analysis
Cristiano Ronaldo loses his cool to be sent off for the ninth time in his career as Real Madrid edge out Cordoba.
Tom English hears of the childhood terror of Glasgow winger Tommy Seymour, and of his love for his club.
While a replay could transform Cambridge's future, Manchester United's display is cause for serious concern, says Phil McNulty.
Six disallowed goals, a never-ending game and the man who rejected Mourinho - some great FA Cup fourth-round stories.
BBC Sport's football expert Mark Lawrenson takes on Cambridge United legend Dion Dublin for his fourth-round predictions.
Track all the latest signings day by day throughout January in England, Scotland and across Europe.
Your guide to sport on the BBC, including the Australian Open tennis and the FA Cup fourth round.