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 in his first game since December 4. Freiburg super-sub Nils Petersen levelled seconds after coming on for his 100th top flight goal but substitute Serge Gnabry, Kingsley Coman and Marcel Sabitzer cliched full points for Bayern. However, there was some confusion in the closing stages as Bayern appeared to have fielded 12 players for a few seconds. Bayern ar…