1. You can simply disable the ball and players movement for 5 seconds, then resume. Say, if you are using Bullet for the ball, set Bullet state to disabled, wait 5 seconds, set to enabled. Alternatively, you can set System Time Scale to 0 for five seconds.
2. Add an instance variable MatchesWon to the player sprite. Add 1 every time a player wins the match. If MatchesWon=2, game over.
PS: Who's Manuel? :)