Britain's double Olympic champion Mo Farah has said he will continue to work with coach Alberto Salazar who is being investigated by the U.S. Anti-Doping Agency (USADA).
Here's a collection of some of the best photos from around the world shot by ace Reuters photographers in the last 24 hours.
'We are on anti-terrorist alert four (with five a very high risk) and there will be extensive security so as to guarantee that the match takes place with complete normality'
Britain's double Olympic champion Mo Farah denied ever taking performance-enhancing drugs and said rumours and speculation over his career after the revelation that he missed two drugs tests "are completely false".
A summary of Tuesday's group matches in the UEFA Champions League.
A 3-0 win over Sedan put them on top of the table though only on goal difference.
Australia has backed a World Anti-Doping Agency (WADA) recommendation that Russia be banned from international athletics, including the 2016 Olympics, after a report alleged systemic state-backed cheating.
Photos from the football matches played in the Serie A, Bundesliga and French Ligue 1 on Sunday
Fernando Alonso warned McLaren they were making him look like an amateur.
Lamine Diack, the former head of world athletics, has been placed under formal investigation in France on suspicion of corruption and money laundering following a complaint from the World Anti-Doping Agency (WADA).
Lewis Hamilton is a perfect match for Kendall Jenner and wants to see them together.
Manchester United will not be signing Colombia forward Radamel Falcao on a permanent basis, the Premier League club said on Sunday after the final game of the season.
Zlatan Ibrahimovic bagging four goals, while Juventus and Bayern Munich preserved their leads and FA Cup holders Arsenal were dumped out of the competition.
World champion Lewis Hamilton is better for Formula One than either Sebastian Vettel or Nico Rosberg, the sport's commercial supremo Bernie Ecclestone said on Sunday.
Formula One was accused of sending out a mixed message on alcohol at the Monaco Grand Prix on Friday by giving extensive publicity to drinks brands while campaigning for road safety.
Formula One supremo Bernie Ecclestone has taken legal action against British tax officials after facing a demand for payment of more than 1 billion pounds ($1.57 billion) in relation to a family trust.
The World No 1 Serena was joined by Hollywood actress Eva Longoria at a Champ'Seed party in Monaco.
Double Formula One world champion Lewis Hamilton has agreed a new three-year contract that will keep him at Mercedes until the end of 2018, the team announced on Wednesday.
News of all that's transpired on and off the football field
Paris St Germain clinched a third successive Ligue 1 title, with a game to spare, and stayed on course for an unprecedented domestic treble with a 2-1 win at Montpellier on Saturday.
Cristiano Ronaldo scored twice in his 150th European appearance to give Real Madrid a 3-1 victory at Borussia Dortmund, their first against them in Germany, and make it two wins out of two matches in their Champions League Group H.
Novak Djokovic scraped over his first hurdle at the Rome Masters.
Lewis Hamilton's long-awaited new deal with Mercedes could be announced at the showcase race of the Formula One season in Monaco next week.
A summary of sports events and sports persons, who made news on Saturday
Paris St Germain took a big step towards the Ligue 1 title when Edinson Cavani's hat-trick inspired them.
News of all that's transpired on and off the football field
Coach Massimiliano Allegri dismissed suggestions that the newly crowned Serie A champions have nothing to lose
Next year's season-opening Australian Formula One Grand Prix in Melbourne has been brought forward to March 20, to allow space for an August break, after previously being listed for a later than usual start on April 3.
Wounded VfL Wolfsburg, who drew 1-1 with Hanover 96 on Saturday after being crushed 5-1 by Bayern Munich last week, will meet Manchester United in Wednesday's Champions League game.
It rallied from a 2-0 deficit to draw 2-2 with Chelsea and reach the Champions League final 5-3 on aggregate.
When Massimiliano Allegri arrived in Turin last July, Juventus ownership had set two goals for him - win a fourth straight "Scudetto" and reach the Champions League quarter-finals.
Javier Hernandez has been a bit-part player at Real Madrid since joining on loan from Manchester United but injuries handed the Mexico striker a rare chance on Wednesday which he took with aplomb.
Andres Iniesta will always be a hero to Barcelona.
Javier Pastore's double inspired a weary Paris St Germain to a 3-1 win at Nice as the French champions reclaimed top spot in Ligue 1 on Saturday.
French teenager Anthony Martial, having scored as a substitute on his Premier League debut in Manchester United's last game, added two more goals to earn his team a 3-2 win at Southampton on Sunday.
Serbian tennis star Novak Djokovic and Ethiopian sprinter Genzebe Dibaba were named the Laureus Sportsman and Sportswoman of the Year respectively in a glittering ceremony.
Seventh seed Wawrinka of Switzerland set up a third-round meeting with Bulgarian ninth seed Grigor Dimitrov after seeing off Argentine Juan Monaco 6-4, 6-1.
Real Madrid full-back Dani Carvajal was lucky to escape without a red card after he threw a punch at Atletico Madrid forward Mario Mandzukic in Tuesday's 0-0 Champions League quarter-final, first leg draw at the Calderon.