Emma Raducanu felt like she was playing "two v one" as the Briton criticised umpire Ana Carvalho following her Nottingham Open first-round victory over Ena Shibahara.

The former US Open champion, who opted to miss the French Open to focus on preparing for the grass-court season, overcame the Japanese 6-1 6-4 in her first match since losing to Maria Lourdes Carla at the Madrid Open in April.

It was also Raducanu's first win on surface since the 2022 Wimbledon Championships, having missed last year's grass-court season after undergoing wrist and ankle surgery that, at one point, left her confined to a mobility scooter.

Although, the 21-year-old was left unhappy with several questionable decisions by umpire Carvalho, suggesting some of the calls were deliberately made in order to extend the contest.

It comes just 24 hours after fellow Briton Harriet Dart slammed "pretty appalling" officiating during her defeat to Katie Boulter in Nottingham, where electronic line-calling technology is not in use.

Nevertheless, Raducanu was pleased to eventually prevail and book her place in the second round.

"I feel like I was playing two v one on court, it was insane," said Raducanu. "I would have used probably at least four challenges!

"I think a lot of the time they go both ways. Today, I felt they were all against me, but it just makes me feel better that I managed to beat her and the umpire as well.

"It is difficult when there is no challenge, but it is something everyone has to deal with. You can be fortunate in some ways. Maybe it was just trying to make the match more competitive.

"It's something I had to deal with and overcome. I am very pleased with the attitude I came out with from the get-go and also having to deal with the adversity.

"I haven't played in a match for a while. Playing someone who comes through qualifying and is used to the conditions, I am very pleased to have won that match."

The world number 209 was also thrilled to get a win under her belt on home soil, and set up a last-16 clash with Ukrainian Daria Snigur, who defeated second seed Marta Kostyuk.

"An element of me forgot what it was like to play at home and have that support behind me, and it is amazing," she added. "It's a great feeling.

"I am very lucky to have great support wherever I play, but it's not quite like coming and playing in the UK. It's something that me and all the Brits cherish and look forward to every year."

Harriet Dart became the first British casualty at Wimbledon after she lost in three sets to Frenchwoman Diane Parry.

The British number four had an impressive build-up to her home grand slam, reaching the quarter-finals in Nottingham and Birmingham, but fell 6-7 (4) 6-0 6-4 to Parry.

Dart, who reached the third round here in 2019, was up against it from the start in tricky conditions on Court 12, where the wind was causing issues, as she fell 3-0 down in the opening set.

But she found her feet and levelled at 5-5 after an impressive long rally ended in her firing a superb cross-court backhand winner.

That seemed to turn the tide as Dart went on take the set in a tie-break and the Briton would have been eyeing a straight-sets win.

But the wheels soon came off as Parry raised her level with some heavy forehand hitting and breezed to the second set in just 33 minutes without letting Dart win a game.

The writing was on the wall when Parry broke early in the decider to take a 3-1 lead, but to Dart’s credit she immediately hit back to stay in the match.

However, the world number 96 struck again at 5-4 to clinch her place in the second round and send the first home hope packing.

Harriet Dart is confident her game is heading in the right direction after her run at the Rothesay Classic in Birmingham was ended by a narrow quarter-final loss to Anastasia Potapova.

Dart defeated top-30 player Anhelina Kalinina for the second week in a row to reach the last eight but was unable to capitalise on a good start against fourth seed Potapova, losing out 4-6 6-3 6-4.

It has been a difficult season for Dart, who has plummeted out of the top 100 after a breakthrough year in 2022, but the 26-year-old has found her form on grass and this was a second consecutive quarter-final appearance following on from Nottingham last week.

“I thought it was a really high-level match,” said Dart, who has been awarded a wild card for Eastbourne next week.

“I don’t think I served particularly very well but managed to find a way to get ahead with the first set. I definitely had a lot of chances. But overall a positive week.

“Of course I wanted to do better today and to keep going but it’s important just to keep building week in, week out to be able to compete with the best players in the world.

“And to also be realistic. This is grass, it’s a unique surface. I really enjoy these couple of weeks and just to try and use this momentum for the rest of the season.

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“Today I played someone who’s 21 in the world and lost 6-4 in the third, and I think there’s a lot of areas I can improve on, so it’s heading in the right direction.”

Dart struggled with her serve throughout the match but managed to win the opening set despite five double faults, producing some fine shots from the back of the court, and she made the first move in the second set with a break for 2-1.

But Potapova, ranked 21st, began to punish Dart’s second serve and the Russian turned the match around with a run of four games in a row, cutting down on the errors that had blighted her game.

Dart recovered from 3-1 down in the deciding set to level at 3-3 but Potapova’s heavy groundstrokes were taking their toll and the Russian broke again before serving out the victory.

Potapova next faces second seed Jelena Ostapenko, who mounted an impressive comeback from a set and 4-0 down to defeat Magdalena Frech 4-6 7-5 6-2.

The Latvian played until after 8pm on Thursday night in her victory over Venus Williams and was back on court on Friday lunchtime to take on Pole Frech.

Ostapenko needed treatment for a left calf problem and at one stage looked like she might not finish the match but she managed to turn things around in the second set before taking the decider.

“It was very little time to recover from yesterday because we finished very late,” she said.

“I was struggling as well with my left calf. I was thinking at some point maybe I should not continue but there is a fighter inside of me so I want to play until I cannot walk or something.

“After winning the second set I felt like I was playing better and my footwork was there. I’m really glad to manage to win this match.”

Top seed Barbora Krejcikova is through to the last four for the first time at a grass-court event having beaten teenage compatriot Linda Fruhvirtova 6-3 6-2, and the Czech will take on China’s Zhu Lin, who was a 4-6 6-3 6-2 winner over Rebecca Marino.

Harriet Dart continued to carry British hopes at the Rothesay Birmingham Classic as she beat Anhelina Kalinina for a second successive week to make the quarter-finals.

Dart was awarded a Wimbledon wild card earlier in the day and celebrated in style by earning a 6-3 3-6 6-1 victory over the Ukrainian fifth seed.

The British number four, who has been playing with tonsillitis, beat Kalinina in Nottingham last week on her way to the quarter-finals and this victory books her second successive last-eight spot.

She will face fourth seed Anastasia Potapova or Caty McNally in the last eight on Friday as she continues her impressive build-up for SW19, where she is now guaranteed a spot in the main draw.

“I was always expecting a battle, I played great last week and I knew she would raise her level. The courts are a little bit quicker here so I just had to adjust a little bit more,” she said in her on-court interview.

“I am just really pleased to be through.

“I am kind of used it, I played quite a lot of long matches, not out of choice, but it happens. I always love coming back to Birmingham, it is pretty awesome.

“I love playing on grass and I love playing in front of the home fans and I love these couple of weeks the most for sure.”

The world number 134, who beat fellow Brit Jodie Burrage in the first round, moved into a 3-0 lead but only after saving seven break points during her first two service games.

It took Kalinina 23 minutes to get off the mark but there was no stopping Dart who took the opening set 6-3.

A much closer second set occurred before Kalinina sensed her opportunity in the sixth service game to move 4-2 ahead and force a decider.

But Dart regrouped and raced clear in the deciding set, having match points at 5-0.

Kalinina did make her serve it out, but that proved no problem for the Brit, much to the delight of the Edgbaston Priory crowd.

Earlier in the day, Linda Fruhvirtova progressed into the quarter-finals after the highly-rated teenager defeated Bernarda Pera 6-1 7-6 (3).

China’s Zhu Lin, who beat Katie Boulter on day one, also continued her fine tournament with victory over third seed Magda Linette by a 6-3 6-0 score.

Top seed Barbora Krejcikova started her time in Birmingham with a 6-3 6-3 win over Cristina Bucsa in the first round.