Del Potro is now 7-0 against Kevin Anderson, beating the South African in the final 6-4, 6-4.
The women's event saw a successful title defence, with Lesia Tsurenko beating Stefanie Voegele 5-7 7-6 6-2 in a match that lasted almost three hours.
It was Del Potro's first title since the Stockholm Open previous year and his 21st career singles title.
Thiem pushed for the breaker, and led 6-4 and again had set point with Del Potro serving 6-7.
On Feb. 18 in Uniondale, N.Y., Anderson defeated Sam Querrey in the final of the inaugural New York Open, his first championship since he won at Winston-Salem, N.C., in 2015. "The match point felt great to really go after it and execute the way I wanted to".
The 28-year-old Tsurenko, from the Ukraine, won her fourth WTA Tour title and first since her victory last year at Princess Mundo Imperial.
The Ukrainian seventh seed has yet to drop a set over the last two years on the Acapulco hard court, a hot streak she will expect to extend when she meets unseeded Swiss Stefanie Voegele in Saturday's final.
N.Korean delegation returns home after Winter Olympics
Trump is joined on her trip with press secretary Sarah Huckabee Sanders and Republican senator from Idaho Jim Risch. Her applause draws stark contrast to vice president Mike Pence, who led the delegation during the Opening Ceremony.
"It's such a special tournament for me", Tsurenko said.
"This is just an unbelievable feeling for me to be here".
The 27-year-old Voegele was making her first appearance in a tour final.
South Africa's Anderson moved one step closer to capturing his second consecutive title with his win over American qualifier Donaldson. The Acapulco champion will be one of the favorites when the tournament starts on Thursday. "I'm so glad to win my 21st title playing in Acapulco".
Bouchard, De Minaur gain wild cards for Indian Wells Canada's Eugenie Bouchard and Australian Alex de Minaur were given wild card invitations to the ATP Masters and WTA hardcourt tournament at Indian Wells, organisers said Saturday. I feel like I'm playing great tennis.
Since that accident, the 23-year-old has been unable to replicate the success that saw her rise as high as number five in the world. Anderson was in a fine form before the final, winning the title in NY before heading to Acapulco but he didn't stand a chance today against such a strong rival who did just about everything right on the court. Prize money for both the men's and women's singles champions at the 2018 event will be $1,340,860.
Without tampering rules in place involving players making pitches to other players, this likely won't be the first one James gets. However, among Eastern Conference teams with the best chance to sign James, the Sixers can't be too far off.
Maduro also lifted Venezuelans' food ticket allowance 67 percent to 915,000 bolivars a month, the equivalent of $4.29. Bucking most analysts' consensus, several polls have shown Falcon stands a chance of defeating Maduro.
Korean music performers lit up the stage, starting with K-pop sensation CL with her hits "The Baddest Female" and "I Am the Best". After historic wins for the United States late in the games, Team USA finished fourth with 23 medals total, including nine golds.
McMaster replaced former national security adviser Michael Flynn amid controversy surrounding his meeting with a Russian diplomat. However, sources tell Garrett that the tension regarding McMaster is real, and that an exit strategy may now be in the works.
The Fed has signaled three quarter-point rate hikes for 2018 - the first likely to come at the next Fed meeting in March. Benchmark U.S. crude rose 14 cents to $61.13 a barrel in electronic trading on the New York Mercantile Exchange.
The forward score seven first-half points in just six minutes to help Iowa turn a six-point deficit into a five-point lead. No. 15 MI knocked off Iowa 77-71 in overtime on Thursday in the second round of the Big Ten Tournament in New York City.
Thankfully, because his career is just starting off, he will probably have the opportunity to win this category in the future. James Ivory is all but guaranteed the Best Adapted Screenplay award, and Sufjan Stevens could win for his original songs.
According to the party's rules, the PML-N's CWC is supposed to elect an acting party head within a week of its chief's removal. After taking over as lifetime leader of the party, Nawaz proposed Shahbaz's name for acting president of the party.
Witnesses said that while on the bus she said multiple times that she would "shoot up the school" in a profanity-laden tirade. Police officers patrolled the area throughout the rest of the day and parents were allowed to pick up their children early.
NASA launched another of the world's most advanced weather satellites on Thursday, this time to safeguard the western U.S. GOES-16 also observed the uncertain path of Hurricanes Irma and the rapidly intensifying Hurricane Maria in September.
Le Pen's December 2015 tweets showed executions by ISIS extremists, including the killing of American reporter James Foley . The others showed a man in an orange jumpsuit being driven over by a tank and another man being burned alive in a cage.
Purdue vs. Penn State
The Lions were without their best big man in Mike Watkins and the Buckeyes had a strong end to the season. He scored an emphatic 25 points on 10-of-20 shooting with 5 rebounds and 2 blocks.
Storm hits California, evacuations ordered in mudslide area
The Santa Barbara County evacuations covered residents living near areas burned by three major wildfires over the past 18 months. Those failing to heed the order are advised they are responsible for their own well-being for the duration of the evacuation.
Digital maestro will run President Trump's 2020 campaign
Kushner's attorney Abbe Lowell said in a statement: "Mr Kushner has done more than what is expected of him in this process". After Trump won the Electoral College, however, he expressed gratitude for the digital effort, Parscale said.
Patriots TE Rob Gronkowski is expected to play in 2018
Just in case Gronk hasn't actually made up his mind, dozens of Patriots fans responded to the tweet by asking Gronk not to retire. The 28-year-old is the best tight end in the National Football League and instantly makes the offense better.
New Air Force One Deal Cleared For Takeoff
At issue was the price tag for the two 747 jumbo airplanes that the Air Force bought from Boeing last summer. A White House spokesman said the "informal" contract will save taxpayers more than $1.4 billion.