By Mitch Wilks Chelsea overcame an impressive Red Bull Salzburg to eke out a 2-1 victory in Austria and secure their place in the Champions League knockout stages with a game to spare. Following a touching tribute to Red Bull co-founder Dietrich Mateschitz who passed away on Saturday, the game kicked off in explosive fashion with both sides getting forward freely and enjoying space to attack into, inside a boisterous Red Bull Arena. Once Chelsea perked up and pulled ahead, though, they dominated proceedings, playing Salzburg off the park through to half-time. Die Roten Bullen levelled things u…