The only hard series that the Spurs are facing is the round one, but it seems they can take care of the Nuggets.
If they will pass through the 2nd round, they will be facing either the Blazers or the OKC, I believe they have a good chance, though I think they will be again underdog.
Man, don't take the other team easily. As the playoffs goes, those underrated are hungrier than those on top. So I guess your Spurs should take their enemy seriously and be more hungrier for the title in order to win the series.
Teams that are in the playoffs can't be taken lightly but as far as the series between the Nuggets and Spurs is concern i think the Spurs has a good chance of winning that and if they play the Blazers which also has a good chance of winning their series against OKC, we can base on speculation on history on their head to head at the elimination which is even. Blazer vs Spurs in the second round would be a good series but it's not over yet on the first round.