The deal could be worth AED251 million.
Sane, 24, says Bayern Munich is a "great club " after he signed a five-year contract at the Bundesliga side.
The Germany winger is leaving Manchester City who he joined from Schalke in 2016 for AED169 million.
The football star has won two Premier League titles, the FA Cup and two League Cups.
He says his priority is to win as many trophies as possible with Bayern, and he's targeting the Champions League.
Osaka brings the style again to beat Gasanova in Wimbledon second round
Four-times Grand Slam champion Naomi Osaka continued her impressive start to her Wimbledon campaign with a clinical 6-3 6-2 victory over Russian qualifier Anastasia Gasanova to reach the third round on a sunny Wednesday.
First-half goals send Mexico to comfortable 2-0 victory over Ecuador
Julian Quinones delivered a goal and an assist in the first half for Mexico, who maintained complete control in front of their vocal home fans to earn a 2-0 World Cup victory over Ecuador in a round of 32 match on Tuesday at Mexico City.
Mbappe scores twice as France ease past Sweden 3-0 to reach last 16
Kylian Mbappe scored twice as France swept aside Sweden 3-0 in the World Cup round of 32 on Tuesday, maintaining their perfect record of four wins from four and setting up a last-16 meeting with Paraguay.
Serena and Wawrinka go down fighting at Wimbledon
Serena Williams returned to competitive singles action on Tuesday amid huge fanfare after a four-year absence but the American icon could not overcome the first hurdle at Wimbledon and was beaten 6-3 6-7(6) 6-3 by Australian Maya Joint.
Norway edge Ivory Coast to advance at World Cup
Erling Haaland shattered Ivory Coast's World Cup hopes on Tuesday, netting an 86th-minute winner that sent Norway into the last 16 with a 2-1 victory at Dallas Stadium.
