It was impossible to say who would have the best chance to win the match: Goffin, the world's number 16, or Cilic, the world's number 12.
Goffin enjoyed the support of the home crowd in Liège, took a strong start, and stood strong, despite losing the 3rd set against the tall Croatian. At 5-6 down in set 4, Cilic faced 2 break points on his own serve. He saved the first, but double-faulted to help Goffin clinch the victory next.
The final singles match will be between underdog Kimmer Coppejans (ATP-122) and Borna Coric (ATP-47). Croatia start as the favourites to advance to the quarter-finals, where the U.S. will be the next opponents. The loser will face a play-off match to stay in the World Group in September.