With Lewis Hamilton and Mercedes dominating Formula One, the real drama at this weekend's Italian Grand Prix could come from frightening tire deterioration on a Monza circuit that features the highest speeds in the sport.

Two weeks ago at the Belgian GP, the right rear tire of Sebastian Vettel's Ferrari was torn to shreds at 320 kph (200 mph) in the penultimate lap. That came two days after the same thing happened to Nico Rosberg in practice, prompting the Mercedes driver to demand action from tire supplier Pirelli before Monza.

Nick Kyrgios does what he wants and says what he wants on a tennis court, seemingly no matter the ramifications, and amid all the near-napping, cursing and racket smashing, he troubled Andy Murray for moments at the U.S. Open.

Only for brief moments, though.

Tokyo Olympic organizers on Tuesday decided to scrap the logo for the 2020 Games following another allegation its Japanese designer might have used copied materials.

Reversing their earlier support for designer Kenjiro Sano against allegations of plagiarizing the design, the organizers said the decision came after new accusations over the weekend.

Germany coach Joachim Loew is backing Bastian Schweinsteiger to brush off his shaky start at Manchester United when he captains his country in Friday's key Euro 2016 qualifier against Poland.

The world champions host Poland in Frankfurt with Adam Nawalka's visitors top of Group D by a point from Loew's Germany, who then face third-placed Scotland in Glasgow on Monday, in two important qualifiers for Schweinsteiger's side.

The deadline arrived, but the announcement never did.

In a surreal ending to the transfer window in Spain, the much-anticipated move of Manchester United goalkeeper David de Gea to Real Madrid never materialized. The clubs reportedly struck a deal, but the expected announcement never came, apparently because the paperwork wasn't submitted on time.

Even before Serena Williams set foot in Arthur Ashe Stadium on Monday night, her path through the U.S. Open to complete a true Grand Slam became a lot easier thanks to losses by other top women.

And when it was the No. 1-seeded American's turn to play her first-round match, she was not tested one bit by a woman who appeared overwhelmed by the opponent, the occasion and, to make matters worse, an injured left foot.

Juventus have bolstered their depleted midfield following the departure of Andrea Pirlo and Arturo Vidal by signing Hernanes from Inter Milan and upcoming Frenchman Mario Lemina from Marseille.

Hernanes, known for his great ball control and play-making skills, signed a three-year deal worth 11m euros ($12.4million, £8million) to become Juve's second signing on the final day of the summer transfer period after France under-21 midfielder Lemina, who joins on a season-long loan deal.

Ex-Germany international and Bayern Munich captain Stefan Effenberg doubts veteran French winger Franck Ribery can return to fitness from the ankle injury which has sidelined him since March.

"If he comes back and manages to get 100 percent fit, then Bayern will need him," Sky expert Effenberg said of the 32-year-old Ribery.

Brazilian midfielder Casemiro has extended his contract with Real Madrid until 2021, the Spanish giants confirmed on Monday.

The 23-year-old has returned to the Santiago Bernabeu this season after a successful year at Porto as Madrid exercised a buy-back clause in the deal which took him to the Portuguese side.

Juventus goalkeeper Gianluigi Buffon has called on the stuttering Italian champions to stand up and be counted after a second consecutive league defeat left them in the Serie A Doldrums.

Juve won a fourth consecutive scudetto last season and secured their first league and Cup double in 20 years before ending a 12-year wait to challenge for the Champions League final last May.