Bencic broke Aiava at love to open the match, one of the six break points she converted, and was never really tested as the 18-year-old Australian made 24 unforced errors.
Sania Mirza of India and Ivan Dodig of Croatia bested defending champions Martina Hingis of Switzerland and Leander Paes of India 7-6 (7-1), 6-3 in the mixed doubles quarter-finals.
Sania Mirza entered the women's doubles semi-finals and set up a high-intensity clash against Leander Paes in the mixed doubles after both the Indians made the quarter-finals with their respective partners in the Australian Open in Melbourne.
While the 19th seed Latvian may be disappointed with the outcome, Sevastovoa said she left her first Grand Slam semi-final with a sense of accomplishment.
Images from the Australian Open matches played on Tuesday.
Andy Murray returned to the All England Club in the men's doubles on Thursday and eased into the second round with French partner Pierre-Hugues Herbert.
The Australian Open started with a bang and the stars weren't hard to miss, as most of them were seen wearing loud colours at Melbourne Park.
World No 3 Maria Sharapova withdrew on Monday from the end-of-season WTA Championship in Istanbul due to the shoulder injury that also kept her out of the US Open.
Former champion Caroline Wozniacki reached the semi-finals of the Eastbourne grasscourt tournament with a 7-5, 6-1 defeat of Germany's Andrea Petkovic on Thursday.
Russia's Anastasia Pavlyuchenkova stands on the threshold of finally delivering the title long predicted
Images from Day 5 of the French Open, at Roland Garros, in Paris.
Australian Open champion Angelique Kerber eased past nemesis Irina-Camelia Begu with a 6-2, 6-3 victory on Friday that put her into the semi-finals of the Volvo Car Open clay court event in South Carolina.
IMAGES from Day 6 of the matches played at the US Open at Flushing Meadows on Saturday.
Form guide for American Serena Williams ahead of Thursday's US Open semi-final clash against Latvia's Anastasija Sevastova:
Sloane Stephens was keen to swat away any references to a controversial clash against Victoria Azarenka at last year's Australian Open as the American advanced to a possible fourth-round clash against the two-times champion on Monday.
Serena Williams can break Margaret Court's record of 24 Grand Slam singles despite being five short at an age when most players have retired, according to Martina Navratilova.
When it comes to tennis parties, there is none bigger than the WTA Pre-Wimbledon Party. Check out some images from the party.
World number one Naomi Osaka lost in three sets to unseeded Swiss Belinda Bencic in the Madrid Open quarter-finals on Thursday as Simona Halep, Sloane Stephens and Kiki Bertens completed the final four line-up.
Venus Williams also went the distance before claiming a 2-6, 6-3, 6-3 victory over Croatia's Donna Vekic.
In an exciting back-and-forth rubber lasting three hours 45 minutes, Siniakova held off the 19-year-old Fed Cup debutante to give the Czechs a 3-0 win in the final against a United States team who were the defending champions but were missing their top players.
IMAGES from Day 9 of the US Open matches played on Tuesday
With next week's Australian Open in mind, a weary Venus Williams has opted to skip the Hobart International while her American compatriot Sloane Stephens has pulled out of the Sydney International with a minor wrist injury.
Kenin, Andreescu to be part of team event in Charleston in June
Defending champion Sloane Stephens was sent packing from the Miami Open on Sunday after a 6-3, 6-2 loss to Germany's Tatjana Maria in the third round.
Tournament officials said there was no heat rule in effect on Friday for the first time in three days, with cloud cover expected to bring cooler temperatures.
Images from Day 5 of the 2021 US Open in New York on Friday.
Following Iga Swiatek's victory over Coco Gauff in the final, here's a list of French Open women's singles champions:
A summary of Wednesday's action at the US Open.
Awesome images from the world of Sport 2018.
Venus Williams avoided another early exit with a routine win over fellow American Alison Riske at the Volvo Car Open in South Carolina while Swiss second seed Belinda Bencic was ousted by Russian qualifier Elena Vesnina.
Thousands of mask-free spectators flocked into the stadium
Indian tennis stars Sania Mirza and Rohan Bopanna advanced to the quarter-finals of the women's and mixed doubles events respectively after notching up contrasting victories with their partners at the Australian Open.
Svitolina arrived in Singapore out of form yet determined to "silence the haters", who she said believed she did not deserve to be in the tournament, and the Ukrainian has played brilliantly to win all three pool matches and her semi-final.
World Number one Simona Halep and Japan's Naomi Osaka are among the players nominated for the Women's Tennis Association (WTA) Player of the Year award.
Photos from Day 1 of the Australian Open matches played at Melbourne Park on Monday
IMAGES from the Miami Masters played in Key Biscayne, Florida on Tuesday
Images from Day 2 of the 2022 Australian Open in Melbourne on Tuesday.
Images from Day 1 of the Wimbledon tennis championships in London, on Monday.
Roger Federer, Rafa Nadal and Novak Djokovic have won the last 11 Grand Slams between them and an incredible 54 since 2003.
The exodus of seeded players has been so spectacular that only one of the top 10 remains -- number seven Karolina Pliskova.
