Freiburg moved up into fourth in the Bundesliga pending the weekend matches after a lively 0-0 draw at Union Berlin on Friday. Vincenzo Grifo saw his penalty saved by Union keeper Frederik Rønnow in a first half which Freiburg dominated. But the hosts were always in the game and improved in the second half, captain Christopher Trimmel going close from distanceand Yorbe Vertessen also being denied by Noah Atubolu after a good move. Aljoscha Kemlein also had a good chance for the Irons. Freiburg then could have won it late on through substitute Lucas Höler and Philipp Lienhart in a flowing game,…