FIFA Secretary General Jerome Valcke acknowledged Tuesday that it will take "years to rebuild our reputation" following the World Cup bidding corruption investigation.

But Valcke insisted that Sony and Emirates airline are not ending their FIFA sponsorships to protest against allegations of bribery and favor-seeking that have engulfed world football in the four years since Russia was awarded the 2018 World Cup and Qatar was voted the 2022 hosts.

Lionel Messi made a slice of European football history as the Barcelona striker hit a hat trick to become the Champions League's all-time top scorer in a 4-0 win over APOEL on Tuesday.

Three days after breaking a Spanish league record that had stood since 1955, Messi was again unstoppable.

Edinson Cavani scored twice and Zlatan Ibrahimovic got his first club goal for nearly three months as Paris Saint-Germain overcame a second-half wobble to beat Ajax 3-1 in the Champions League on Tuesday.

PSG stays one point ahead of Barcelona in Group F before they meet at the Nou Camp in two weeks' time. Both teams had already qualified before Tuesday's games.

Sergio Aguero scored a hat trick — including two late goals — to inspire Manchester City to a 3-2 win over 10-man Bayern Munich on Tuesday, reviving the English champions' chances of reaching the Champions League's knockout stage.

Aguero put City ahead with a 21st-minute penalty that led to the sending-off of defender Mehdi Benatia, then capitalized on defensive errors to score again in the 85th and in the first minute of stoppage time.

Greek champions Olympiakos face a tough task if they are to prevent last season's beaten finalists Atletico Madrid sealing their passage into the last 16 of the Champions League at the Vicente Calderon on Wednesday.

Olympiakos haven't played a competitive game since thrashing Panthrakikos 5-1 on November 9 as the Greek league was suspended last weekend following a violent attack on a senior official of the country's referee board.

Roger Federer and Lleyton Hewitt will clash in a new shortened, faster form of the game ahead of the Australian Open that organizers Tuesday said they hope will revolutionize tennis.

In a world first, the 17-time Grand Slam champion will play his long-time Australian rival in a Sydney exhibition to showcase the new concept developed by Tennis Australia.

Sony has decided not to renew a multi-million-dollar sponsorship contract with FIFA, a report said Tuesday, as the money-losing electronics giant undergoes a painful restructuring.

Japan's leading Nikkei business daily said the eight-year, 33 billion yen ($280 million) contract, which expires this year, would not be re-negotiated owing to worries that a new deal would be even more costly.

Brazilian football legend Pele was back in hospital Monday in Sao Paulo, days after he underwent surgery for kidney stones.

"Patient Edson Arantes do Nascimento (Pele) has been admitted for evaluation and remains in stable condition," said a statement from Albert Einstein Hospital.

Arsenal's Germany forward Lukas Podolski has repeated his frustrations at being kept on the Gunners' bench, heightening speculation he may leave in January's transfer window.

"I like London, I like the club, but I don't like the situation," he told German magazine Kicker having again sat on the bench for Arsenal's 2-1 home defeat to Manchester United.

Ferrari on Monday sacked team chief Marco Mattiacci after just seven months in the post and appointed Maurizio Arrivabene in his place, a team statement announced.

Arrivabene takes over only days after the team signed Germany's four-time world champion Sebastian Vettel on a three-year contract starting from next year.