Kevin Durant returned to the lineup and the Warriors completed their first-round sweep of the Blazers, while the Hawks pulled even with the Wizards, and the Raptors went up 3-2 on the young Milwaukee Bucks.
Here are three things we learned from Monday's three-game slate of NBA playoff basketball.
The Raptors, at the height of their powers, are clearly the second-best team in the East
The Celtics may have finished the regular season with the best record in the East, but after seeing the Raptors put together their best game of the playoffs with Monday's 118-93 win over the Bucks, there's no question that they're the only team in the conference that can challenge LeBron James and the Cavaliers.
We finally saw Toronto play at the height of its powers, and it was indeed a formidable sight. Serge Ibaka set the tone with some dominant play early on both ends of the floor, which included a couple of dunks in the vicinity of Giannis Antetokounmpo. He finished with 19 points on 8-of-10 shooting, to go along with six rebounds and three blocked shots in less than 25 minutes of action.
Norm Powell provided an even bigger spark, finishing with a team-high 25 points in his first start of the series.
Kyle Lowry and DeMar DeRozan combined for an efficient 34 points, but the Toronto attack was more balanced than we've seen in quite some time. The defense was on point too, as Giannis got his, but no one else outside of rookie Malcolm Brogdon was able to do any real damage.
This is the Raptors team many expected to see when Ibaka was added to the mix in a midseason trade. Toronto can be very dangerous moving forward if the team can play the way it did in its Game 5 win over the Bucks.
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The Hawks are peaking in the playoffs
The Hawks had an extremely uneventful regular season. They limped to the finish line thanks to Paul Millsap missing 10 of the final 14 games due to injury, and the Wizards seemed primed for an easy first-round victory after finishing six games ahead of Atlanta in the standings, securing home-court advantage in their first-round matchup in the process.
But after seeing the Hawks cruise to a 111-101 Game 4 victory to even the series at two games apiece, it seems as though this Hawks team may be peaking at the right time. Dwight Howard was actually effective in this one, finishing with 16 points and a team-high 15 rebounds while helping to control the paint defensively. Jose Calderon was a game-high plus-29 in 20 minutes off the bench, and every Hawks player seemed to find meaningful ways to contribute, as Washington never found the answer to stopping Atlanta's attack.
It's worth noting that Hawks head coach Mike Budenholzer spent years on the bench next to the Spurs' Gregg Popovich, and that equal-opportunity style of offense was finally on full display in this one.
The Warriors showed that all-important killer instinct
The Warriors headed into Monday night's Game 4 with the Blazers with a 3-0 lead in the series, and after the way the 2016 NBA Finals ended, (you know, with Golden State blowing a 3-1 lead over the Cavaliers) it was immediately clear that the killer instinct that was missing from last season's squad was present in this one.
The Warriors opened the game on a 22-3 run, set a franchise playoff record for points in a first quarter with 45 and led by as many as 33 points on the way to a 128-103 win to complete their first-round sweep.