Heat president Pat Riley says he wishes he would have done more to keep Dwyane Wade in Miami. Riley spoke Saturday for the first time publicly since Wade decided to leave the Heat after 13 seasons and sign with the Chicago Bulls. Riley said he regrets not going to New York to woo Wade personally, and that Wade’s decision to leave Miami ‘‘floored me.’’ Riley said it was his responsibility to keep Wade and he blamed himself for not getting it done, saying he had great regrets about how the process played out earlier this month. Riley said, ‘‘From my standpoint and from the team standpoint, we’ve had a tough summer — period.’’ The Heat still don’t know if Chris Bosh — whose last two seasons were cut short at the All-Star break by the formation of blood clots — will be able to play again. Bosh is working out and has told the team he intends to play, but that’s hardly a guarantee he will actually be cleared and ready when training camp starts in late September . . . Nate Thurmond, a Hall of Fame center for the Golden State Warriors and the Cleveland Cavaliers, died after a short battle with leukemia. He was 74. Obituary, B10 . . . The Memphis Grizzlies signed first-round draft pick Wade Baldwin IV, a guard.

Olympics

Letter supports Russian ban

A letter drafted by US and Canadian anti-doping leaders urging Russia’s removal from the upcoming Olympics is circulating days before the public release of a report expected to detail a state-sponsored doping system that corrupted the country’s entire sports program. The letter, drafted last week and obtained by the Associated Press, is being prepared to be sent to the International Olympic Committee’s president and executive board after the Monday release of the report by investigator Robert McLaren. The letter calls for the IOC to act by July 26 to ensure that Russia’s Olympic Committee and sports federations will not be allowed in Rio de Janeiro. The letter encourages exceptions for Russia-born athletes who can prove they were subject to strong anti-doping systems in other countries . . . The International Canoe Federation banned sprint teams from Romania and Belarus from the Olympics for widespread doping. The ICF said its executive board imposed one-year suspensions for both teams ‘‘with immediate effect.’’ . . . Czech tennis players Tomas Berdych, ranked eighth on the men’s tour, and 16th-ranked Karolina Pliskova withdrew from the Olympics over concerns about the Zika virus . . . French cyclist Thibaut Pinot won’t compete at the Olympic Games because of a viral infection he caught during the Tour de France.

TennisCroatia beats Bryan twins

Ivan Dodig and Marin Cilic kept Croatia alive in the Davis Cup quarterfinal match with the United States, beating twins Bob and Mike Bryan, 6-2, 2-6, 6-2, 6-4, in Portland, Ore. Dodig and Cilic cut Croatia’s deficit to 2-1 heading into the reverse singles Sunday . . . Visiting teams Britain, Argentina, and France all won hard-fought doubles matches to take 2-1 leads in their Davis Cup quarterfinals. Britian’s Jamie Murray and Dom Inglot beat Serbia’s Nenad Zimonjic and Filip Krajinovic, 6-1, 6-7 (2-7), 6-3, 6-4, in Belgrade. For Argentina, Juan Martin Del Potro and Guido Pella outlasted Fabio Fognini and Paolo Lorenzi, 6-1, 7-6 (7-4), 3-6, 3-6, 6-4, over nearly four hours in Pesaro, Italy. France’s Nicolas Mahut and Pierre-Hugues Herbert won their Cup debut over hosts Lukas Rosol and Radek Stepanek, 6-1, 3-6, 6-3, 4-6, 6-4, in the Czech Republic.

Halep reaches home final

Simona Halep came from a set down to reach the Bucharest Open final in Romania and take a shot at her second home title. Halep held off Vania King, 6-7 (3-7), 6-4, 6-3, to play Anastasija Sevastova, who dispatched Laura Siegemund, 6-3, 6-2, for the championship . . .Albert Ramos-Vinolas and Fernando Verdasco set up an all-Spanish final for the Swedish Open title in Bastad.

Miscellany

Astros sign Cuba’s Gurriel

The Houston Astros signed international free agent Yulieski Gurriel to a $47.5 million, five-year contract. Gurriel, an infielder, was one of the most sought-after international free agents since defecting from Cuba in February . . . First baseman Justin Smoak agreed to a two-year contract extension worth $8.25 million with the Toronto Blue Jays . . . The Kansas City Royals reinstated closer Wade Davis from the 15-day disabled list . . . Struggling Atlanta Braves closer Arodys Vizcaino was placed on the 15-day disabled list with a right oblique strain . . . Deontay Wilder retained his WBC heavyweight title with a technical knockout when Chris Arreola’s corner stopped the fight after the eighth round in Birmingham, Ala. . . . In Major League Soccer, Marlon Hairston scored and Tim Howard had his second shutout in three games to lift the host Colorado Rapids over Sporting Kansas City, 1-0, to extend their franchise-record unbeaten streak to 14 games . . . Fabian Espindola scored in the 89th minute to give D.C. United a 1-1 tie with the host Columbus Crew . . . Maximiliano Urriti scored and Fabian Castillo had two assists in FC Dallas's 3-1 victory over the visiting Chicago Fire . . . Scott Dixon turned a lap of 59.9073 seconds to win the Indy­Car pole at Toronto.