Celtics coach Brad Stevens isn't letting his team become content after 14 straight wins, and he continues to suggest that Boston might not be as good as its record indicates. "We haven't played well enough to consider this win streak to be valid in my opinion," Stevens said Saturday morning at Boston's shootaround at Philips Arena. "We've figured out ways to win games. We gotta play a lot better." The Celtics have caught the league's attention with their double-digit winning streak in the aftermath of starting the season 0-2 and losing Gordon Hayward to a season-ending ankle injury. When Boston took down the defending champion Golden State Warriors on Thursday, limiting the league's top-ranked offense to a mere 88 points, the buzz reached new heights and many wondered if the young Celtics are the new top dog in the Eastern Conference. Stevens is happy his team is finding ways to win games, but he doesn't want the results to deter them from improving, particularly a group that ranks 23rd in offensive rating. "We've got to be better, and we know that," Stevens said. "We can't get so caught up in the results of all these games and ride that emotion. We've been fortunate to win a lot of the games in this streak, including Thursday night. If we dig ourselves a 17-point hole every other game, it's not going to be as much fun as we've had recently." The Celtics have three times rallied from deficits of 17 or more during their streak, including twice coming back from 17-point deficits against the Warriors.