Swansea boss Michael Laudrup was disappointed to see both Wilfried Bony and Angel Rangel limp off during their defeat to Valencia.
Swansea's skipper for the night Leon Britton admits his side are still learning about the complexities of competing in Europe.
A goal from Alvaro Vazquez is wrongly disallowed.
Pedro Joao Pereira does some cracking jumping to the ground.
Dani Parejo is allowed to slot the ball into an empty net from inside the area.