Philippe Coutinho scored his first league goal since returning to Barcelona to help his side draw 1-1 at home to an excellent Sevilla side in La Liga on Sunday.
Although this cannot be used as yet, the experiment carried out by the researchers at the University of Stuttgart shows that an engine does basically work, even if it is on the microscale.
Former world number one Rafael Nadal is feeling confident about his chances of competing for a third US Open title when the tournament starts in New York next week.
Russia's Maria Sharapova beat World No. 1 Victoria Azarenka 6-1, 6-4 in the Stuttgart clay court final on Sunday to claim her first WTA tour title of the year and end a two-match losing streak against the Belarussian.
World number two Rafael Nadal dropped a set at the Barcelona Open for the first time in four years before advancing to the last 16, beating Argentine Leonardo Mayer 6-7(7), 6-4, 6-2 on Wednesday.
Top seed Alexander Zverev crashed out in the second round of the Stuttgart Open, losing to world number 170 Dustin Brown.
Bayern Munich threw the Bundesliga title race wide open when Arjen Robben secured a 1-0 win at Nuremberg on Saturday, closing the gap on leaders Borussia Dortmund to three points.
World number one Andy Murray is against giving wild cards to players returning from doping bans but the 29-year-old understands why tournament organisers make an exception for "big names".
The second seeds defeated Czech-Ukrainian duo Luka Rosol and Sergiy Stakhovsky 2-6, 6-3, 10-8.
An architectural wonder, the Porsche Museum is a car enthusiast's delight.
The fourth seed Indo-Romanian pair needed 70 minutes to get the better of the 2014 US Open champions Marin Cilic of Croatia and Frank Moser of Germany 6-3, 7-6(10).
Salomon Kalou scored a hat-trick as Hertha Berlin beat Hanover 96 3-1 on Friday, their second win in three matches helping them climb to fourth in the Bundesliga.
Naomi Osaka is also the first woman to win a second Slam immediately after her first since Jennifer Capriati in 2001 but her meteoric rise has been followed by a distinct dip ahead of Roland Garros.
Indian qualifier Prajnesh Gunneswaran achieved the biggest win of his career when he stunningly knocked out World No 18 Nikoloz Basilashvili at the Indian Wells ATP Masters event, continuing his dream run.
Argentina cruised into the semi-finals of the Davis Cup and looked poised for a clash with defending champions Serbia who moved into a 2-0 first-day lead away to Sweden on Friday.
News of all that's transpired on and off the football field
Veteran tennis player Rohan Bopanna said he plans to team up with Divij Sharan and represent India in the men's doubles event in next year's Tokyo Olympics.
Sania Mirza and her Swiss partner Martina Hingis progressed through to the quarter-finals of the Italian Open with a straight sets victory in the women's doubles event in Rome.
Maria Sharapova's comeback from a doping ban will include an appearance at the Rogers Cup in August after the former world number one was granted a wild card by the organisers of the Toronto tournament on Tuesday.
Arsenal have made a surprise move to sign their former goalkeeper Jens Lehmann on an emergency loan deal, British newspapers reported on Monday.
The 21-year-old is looking to become just the 11th woman to claim a third consecutive Grand Slam title.
Images from the Champions League second-leg match played on Wednesday.
World No 1 Novak Djokovic maintained his perfect tournament record and advanced to his fifth China Open final with a 6-3, 6-4 victory against Andy Murray on Saturday.
Champions Bayern Munich opened up an eight-point lead in the Bundesliga at the start of the German season's one-month winter break by beating Hanover 96 1-0 on Saturday amid mounting speculation over the future of coach Pep Guardiola.
Dutch teenager Max Verstappen is a rare talent comparable to the late Ayrton Senna, according to Red Bull's Formula One consultant Helmut Marko.
Hot favourites Sania Mirza and Martina Hingis fell by the wayside at the French Open, beaten by seventh seeds Bethanie Mattek-Sands and Lucie Safarova in the quarter-finals of the women's doubles
Liverpool striker Dirk Kuyt headed a late goal to send the five-times European champions into the last 16 of the Europa League with a 1-0 victory over a defiant Sparta Prague at Anfield on Thursday.
Substitute Fredy Guarin gave former European champions Porto a late 2-1 Europa League win at Sevilla on Thursday while their old rivals Benfica beat VfB Stuttgart by the same score.
Bayer Leverkusen beat a second-string Bayern Munich 2-0 on Saturday to move up to third in the Bundesliga and get back on course for an automatic Champions League spot with three matches left in the season.
World champions France had eight players, one less than former holders Spain, in international players' association FIFPro's 55-name shortlist for its World XI of 2018 award.
Former World No 1 Maria Sharapova suffered a setback on her return from injury when she lost 6-4, 6-3 to Lucie Safarova in the first round of the Madrid Open on Sunday.
Justine Henin reached her third final in fourth months since her comeback when she brushed aside Shahar Peer in her semi-final at Stuttgart's indoor clay tournament on Saturday.
With Federer certain, young Austrian Dominic Thiem is third in the ATP race to London, followed by Stan Wawrinka, Alexander Zverev, Djokovic, world number one Andy Murray, and Belgium's David Goffin.
Former world number one Maria Sharapova will miss the grasscourt season, including this month's Wimbledon qualifying tournament, after failing to recover from a left-thigh injury she suffered during last month's Italian Open.
Bayern Munich will be without experienced Franck Ribery when they meet Manchester City in their Champions League Group E opener on Wednesday with fellow winger Arjen Robben also doubtful, coach Pep Guardiola said.
Bayern Munich can either move closer to three titles or miss out on them completely in the coming "weeks of truth", their coach Louis van Gaal said on Monday.
Defending champion Garbine Muguruza of Spain was knocked out of the French Open when she lost 6-1 3-6 6-3 in the fourth round against France's Kristina Mladenovic on Sunday.
Bayern Munich striker Mario Gomez, the Bundesliga's most expensive ever purchase, is already feeling insecure at his new club.
'No words, games, or actions will ever stop me from reaching my own dreams. And I have many'
Maria Sharapova can rise above the furore surrounding her return from a 15-month doping ban if she accepts the decision to deny her a wild card entry to the French Open without rancour, former world number three Pam Shriver has said.
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