Kahn warned "it won't be long before a club bids €150-200 million for a Bayern player."
"It was a perfect hat trick. I scored with my left, with my right, and with my head," Hernandez said.
Draxler, 23, had hoped to leave Wolfsburg following Euro 2016 amid talk of interest from Arsenal and Paris Saint-Germain.
Ribery tweaked Hamburg midfielder Nicolai Muller's cheek as he ran past him in clear view of the referee, who immediately booked him.
Cesar Hernandez rounds up the latest rising talents and falling stars of El Tri's players based outside of Liga MX.
Hamburg have confirmed the appointment of former Hoffenheim boss Markus Gisdol as their new coach, hours after parting company with Bruno Labbadia.