Timo Baumgartl made an emotional first start in his comeback from testicular cancer on Sunday as Union Berlin retained their surprise Bundesliga lead 2-0 over lowly Wolfsburg. Jordan Siebatcheu opened the scoring with a glancing header into the far right corner in the 54th minute off attacking partner Sheraldo Becker who then wrapped up matters with 13 minutes left after controlling a pass from Paul Seguin with his shoulder. Janik Haberer had a first-minute volley saved by Koen Casteels and the Wolfsburg goalkeeper was also on his guard against Baumgartl. Siebatcheu aimed inches right shortly …