Indeed, Celta who will be Real Madrid's next opponent is a team that occupies the middle board. They always do that every season, almost unaffected by the circumstances of the other teams. Here Real Madrid are the favorites of course to be able to win this match. I myself think that Real Madrid will win the game by at least 2 goals difference.
In the first match the two teams got different results, madrid managed to get their first win while the less good result was actually obtained by Celta Vigo when they had to draw with espanyol, the match against celta vigo later will be madrid opportunity to continue the positive trend and in my opinion celta vigo maybe will not provide a strong resistance to madrid later, celta vigo performance in the first match was not optimal and madrid should have won the match very easily when playing at the bernabeu later.
Real Madrid's win in the first game wasn't an easy one, they had to come from a goal deficit, to win the game, while Betis also failed to win by concede a very late goal.
It's not going to be any easier for Real Madrid against Betis, especially with Betis playing at home. It should be a good game to watch.
Barcelona has also got a big test for the weekend, they'll be facing Real Sociedad at the usually cursed Anoeta stadium, and this time they'll needing all 3 points which they couldn't get vs Rayo Vallecano on the first day.