Before the 2019 NBA free agent market opens on Sunday, ESPN's Bobby Marks did some calculation over which teams will have the strongest spending powers to sign the targets they want from the 170-player pool this summer, which is probably the most talented free-agent market in recent years.

There are 13 teams with cap space, including nine that can collect now fewer than 20 million U.S. dollars from their payroll spaces.

New York Knicks: 70 million U.S. dollars

The Knicks will have the biggest cap space which will be enough to sign any of the two free agents with the maximum contracts, including Kevin Durant, Kawhi Leonard or Kyrie Irving. However, their problem is that the team's current franchise is not attractive enough, to say the least, to any superstar. If the Knicks cannot bring any big name to the Madison Square Garden, they can choose to fill their space with one-year deals so that nothing will hold them back in 2020 summer.

Brooklyn Nets: 46.8 million U.S. dollars

Having sent Allen Crabbe to the Atlanta Hawks, the Nets have 46.8 million on their payrolls, which is enough for them to sign Irving, keep D'Angelo Russell and seek further improvements. However, if the team wants to sign both Irving and Durant, giving up Russell alone won't be enough. They have to pray for next season's salary cap to reach 109.6 million U.S. dollars, which does not seem likely so far.

Los Angeles Clippers: 42.3 million U.S. dollars

The Clippers have enough space to offer a maximum contract to one super star while keeping the squad that helped the team make the playoffs last season. However, like the Nets, if the Clippers want two big free agents, they will need to get rid of Danilo Gallinari.

New Orleans Pelicans: 31.3 million U.S. dollars

Though this number is not enough to sign Durant, the Pelicans can still spend it either on other star players or improving their current franchise. Considering that New Orleans is not the most attractive destination to superstars and the team already has enough promising young talents and quality future assets, all thanks to the Anthony Davis deal with the Los Angeles Lakers, the Pelicans are in no hurry to bet on anyone this summer.

Dallas Mavericks: 28.8 million U.S. dollars

The Mavericks already have Luka Doncic and Kristaps Porzingis as their cornerstones, they can seek improvement by offering maximum contract to Irving, Kemba Walker or Al Horford. Meanwhile, the Mavericks can also choose to get rid of Courtney Lee's contract via buyout so they can add another 8.3 million U.S. dollars to their cap space.

Boston Celtics: 24.9 million U.S. dollars

The Celtics may not be happy with such cap space. Danny Ainge has been waiting for so long to make the bet. However, before he made his decision, the two biggest assets of his, Irving and Horford left. Even if the team lets Terry Rozier go to increase their cap space to 34 million U.S. dollars, it won't be enough to compensate for their loss. The only thing the Celtics can count on is that Jaylen Brown and Jayson Tatum can soon grow to All-Star level in the new season.

Los Angeles Lakers: 23.1 million U.S. dollars

Anthony Davis is unwilling to give up his trade bonus, which is about 4 million U.S. dollars. Even if the Lakers send away all their players except LeBron James and Davis, they still won't have enough space to offer a maximum deal, not to mention that the team currently does not even have a qualified starting-lineup. Their best chance may be to convince some free agents to compromise over salaries. Moreover, unlike the above teams, the purple and gold cannot afford to wait because James will be 35 years old before 2020.

Chicago Bulls: 22.3 million U.S. dollars

The Bulls made the right decision introducing Otto Porter last season because they will be able to keep this 25-year-old starting-level wingman for another two years. The team is most interested in finding a good guard partner for Zach Lavine. They may be offering a four-year, 80-million-U.S.-dollar deal to Malcolm Brogdon.

Indiana Pacers: 20.4 million U.S. dollars

The Pacers made the playoffs as No.5 of the Eastern Conference while Victor Oladipo only played 36 games. This summer, they have two major tasks. First, find a backup or insurance plan for Oladipo – that's why the team has been chasing Ricky Rubio. Second, try to keep Bojan Bogdanovic at a reasonable price. If the 30-year-old forward leaves, the Pacers will have 33 million U.S. dollars of cap space.

Phoenix Suns: 14 million U.S. dollars

The Suns have been well-known for making confusing moves. They had prepared over 20 million of cap space for a star point guard. However, after the team accepted Aron Baynes from the Celtics, they will need to give up Kelly Oubre Jr. and Richaun Holmes or trade Josh Jackson before they can raise their space to 23 million U.S. dollars. Before the team does anything else, maybe their front office should meet first so they can figure out what they really want.

Sacramento Kings: 14 million U.S. dollars

The Kings actually have bigger cap space than the number displays. Harrison Barnes (who already opted out his last-year contract) and Willie Cauley-Stein (whose agent made it clear that the 25-year-old center did not want to stay in Sacramento) together occupied 46.8  million U.S. dollars on the team's payrolls. If the Kings let both go, the team can have about 60 million for the 2020 free-agent market.

Atlanta Hawks: 13 million U.S. dollars

The Hawks have continued to do what they had been doing so far: Accepting cap liability contracts and receiving draft picks from other teams. They already swallowed the deals of Solomon Hill and Crabbe. If the team keep Dewayne Dedmon, they won't have much to do on the market. The Hawks already have enough talents like Trae Young, De'Andre Hunter and Cam Reddish. More importantly, they will have 80 million U.S. dollars of cap space next year.

Milwaukee Bucks: 13 million U.S. dollars

The Bucks know that they actually don’t have that much space because they have too many players to offer contract extensions to. Khris Middleton, Brook Lopez, Malcom Brogdon, Nikola Mirotic. The team will have to pay luxury tax in the new season and the only question will be, who will they give up?