Bind a click event to #finished button that will call a filter by opponent setting an "opponent" variable
Add links to the opponents games page that triggers the #finished button click.
When calling the filter by opponents, load game data for player and "opponent" (if not loaded yet) and populate an object "gamesFilter" containing all the opponent players with the list of matching games.
After load all hml data of #finished page, filter the games table using the "gamesFilter" and the "opponent" variable.
http://bgg.cc/article/22906552#22906552 http://bgg.cc/article/21802494#21802494