Bayern Munich president Herbert Hainer hopes Germany star Jamal Musiala will stay at the Bundesliga club in the long term. “It is incredible what he has achieved and how he has developed,” Hainer said about the 21-year-old attacker in a meeting at the Allianz Arena late on Monday. “In my opinion, he could become the second Thomas Müller at Bayern and play here for the next 20 years.” Bayern will “do everything we can to tie him to Bayern Munich for the long term.” Musiala’s contract with the German record champions runs until June 30, 2026. “I think he really appreciates what he has at Bayern….