Federer has been brandishing an aggressive style of play, forcing the action and rushing in to half-volley weak second serves to forge an advantage.
The German, who clinched his seventh Formula One title in Belgium last month, survived a collision, a spin and a puncture in the Chinese Grand Prix.
Tomic has withdrawn from his last four tournaments, pushing his ranking to depths that will require him to battle on lower-tier tours or beg for wildcards from tournament organisers next year.
Halep sustained the injury last month while training for the Wuhan Open, where she lost in the second round. She then retired midway through her opener in Shanghai.
The American fashion model returned to the VS runway after two years.
Had he not jumped the start, Fernando Alonso might have won Sunday's Chinese Grand Prix and gone home with his second win in four races. As it was, in a chaotic race rich in incident, Spain's feisty double world champion provided a talking point later on with a move full of significance for the Ferrari driver's season.
Sebastian Vettel gave Red Bull their fourth pole position in four races with a searing late lap in qualifying for the Chinese Grand Prix on Saturday.
Daniel Ricciardo was a surprise third fastest in his Red Bull, the Australian leaping up the order late in the session after sitting out the opening 45 minutes as the team struggled to cool their brakes.
McLaren's Lewis Hamilton set down a marker for the weekend with the quickest time of the first two practice sessions for the Chinese Grand Prix on Friday.
Here is a timeline of Djokovic's decline since the last of his 12 Grand Slam titles.
World number one Novak Djokovic will bid for a record fourth successive ATP World Tour Finals crown in London later this year after becoming the first man to qualify for the season-ender.
Running as high as sixth, Adrian Sutil aquaplaned off the circuit with just five laps to go as Force India came tantalisingly close to securing its maiden Formula One points in the rain-lashed Chinese Grand Prix before faltering in the closing stages in Shanghai on Sunday.
Lewis Hamilton's Formula One rivals should beware the backlash because the four-times world champion's dip in form will not last long, his former Mercedes team mate Nico Rosberg has warned.
'Just six months ago, you would've been labelled mad for even suggesting the possibility of Djokovic relinquishing the top spot in men's tennis.'
Force India's search for the elusive maiden point in the current Formula One season continues after Adrian Sutil failed to finish while Giancarlo Fisichella finished 17th at the Chinese Grand Prix in Shanghai on Sunday. Fisichella began from the last position of the grid and gained three places when he took the chequered flag in the 56-lap penultimate race of the 2008 Formula One season.
Novak Djokovic no longer sees winning Grand Slam titles or staying top of the men's ATP rankings as a priority in his tennis career, Serbia's world number one said on Friday.
The couple, who is expecting their first child, were on a holiday in London with Kunal's family.
World No 1 Novak Djokovic called for tennis to "improve and evolve" after the women's tour signalled a move towards new scoring formats.
Force India will keep the same lineup of Italian Giancarlo Fisichella and Germany's Adrian Sutil next season, the Formula One team's owner Vijay Mallya said on Friday. Mallya said he has been talking to Mercedes about the possibility of replacing Ferrari because he wants an engine, gearbox and Kinetic Energy Recovery System (KERS) in one package from his supplier for next year.
The good times are back, in a measured way, in fun spots across the globe.
While the 22-year-old Briton celebrated his fourth victory of an extraordinary debut season, his closest rival and double world champion team Fernando Alonso crashed out of an action-packed and rain swept race.
A summary of sports events and sports persons, who made news on Wednesday
Images from Day 3 of the 2020 French Open at Roland Garros, in Paris, on Tuesday.
It was a fun year. I did a lot of fun things. I got Australia back in the world group of the Davis Cup, won a couple of titles, so it's been a good year so hopefully I can back it up in 2017
Formula One world champion Lewis Hamilton has dismissed as wide of the mark reports that he sprayed Russian President Vladimir Putin with the winner's champagne after Sunday's grand prix in Sochi.
The 22-year-old McLaren driver needed to win or finish ahead of team mate Fernando Alonso and Kimi Raikkonen at the Chinese Grand Prix to win the world title but his race ended when he slid off the asphalt and into the gravel when approaching the pit lane.
Schumacher was the quickest, 0.172 seconds ahead of champion Alonso, on a damp track after morning drizzle at an overcast circuit.
Lewis Hamilton will curb his natural attacking instincts at the Japanese Grand Prix in order to strengthen his grip on the Formula One world championship.
The American slumped to a 7-6, 2-6, 6-4 defeat by Frenchman Fabrice Santoro in the first round of the Lyon Grand Prix.
Formula One will revert to its 2015 qualifying format at next week's Chinese Grand Prix in Shanghai and for the remainder of the season, the governing FIA said in a statement on Thursday after backing down in the face of opposition from teams.
The 32-year-old, who has not played since retiring injured in the US Open semi-finals, cited an abdominal injury.
The Renault team boss said they have done everything they could to support Fernando Alonso
The Indian archer qualified despite bowing out in the preliminary round of the individual men's recurve event in the Shanghai World Cup.
The Indian driver was forced to retire on the last lap of the A1 Grand Prix Feature Race in Shanghai.
The world number one Federer lost just five of the 97 matches he played in 2006 and four of those were to Rafael Nadal.
The world number one believes he is pulling away from his rivals in men's tennis.