Complex sentence: In the finals, Ryan-Ciach faced a familiar opponent in second seed Shannon Pluhowsky (USA), the same opponent she defeated the previous year in Honduras to ironically prevent Pluhowsky from winning consecutive titles.
Split into simpler sentences: In the finals, Ryan-Ciach faced a familiar opponent in second seed Shannon Pluhowsky (USA). It was Ryan-Ciach who defeated Pluhowsky the previous year in Honduras that prevented Pluhowsky from winning consecutive titles.