These are the figures: in France 1998 and Japan/Korea 2002, a total of 23 teams lost their first games. Only one of those teams (Turkey in 2002) advanced to the second round. In the same two tournaments, 23 teams won their first game, with 20 of them advancing to the second round.
France 1998 and Japan/Korea 2002
Lost 1st game:
23 teams, of which 1 advanced to the second round for a 4 percent success rate.
Tied 1st game:
18 teams, of which 11 advanced to the second round for a 61 percent success rate.
Won 1st game:
23 teams, of which 20 advanced to the second round for an 87 percent success rate.