Leon Goretzka returned from a long injury lay-off to score in Bayern Munich’s 4-1 win in Freiburg which put the champions nine points clear at the Bundesliga top on Saturday. Germany midfielder Goretzka headed Bayern ahead in the 58th minute off Joshua Kimmich’s free-kick in his first game since being sidelined with a knee-injury from December 4. Freiburg super-sub Nils Petersen levelled seconds after coming on for his 100th top flight goal and league record-extending 32nd off the bench on his first touch. But substitute Serge Gnabry in the 73rd, Kingsley Coman with a shot into the near corner…