Neil Lennon was lost for words after seeing his former side Celtic concede five goals in the first half against Borussia Dortmund. Celtic kicked off their Champions League campaign with a thumping 5-1 win over Slovan Bratisalva two weeks ago. Neil Lennon was lost for words after seeing his former side Celtic concede five goals in the first half against Borussia Dortmund. Celtic kicked off their Champions League campaign with a thumping 5-1 win over Slovan Bratisalva two weeks ago. But they were quickly brought back down to earth in Germany on Tuesday night with Brendan Rodgers’ side enduring a…