Michael Gregoritsch starred as Freiburg boosted their hopes of again qualifying for Europe with a 2-1 Bundesliga win at fourth-bottom Bochum on Sunday. Later, unbeaten leaders Bayer Leverkusen can re-establish their 10-point advantage over Bayern Munich with nine games to go with a win at home to Wolfsburg. Eintracht Frankfurt also take on Hoffenheim. Freiburg coach Christian Streich brought Gregoritsch into the starting line-up following his winning goal off the bench in Thursday’s Europa League last-16 first leg against West Ham United. And it was the Austria forward who bravely headed on a …