When considering famous siblings to have impacted the world of sport only one pair of female sisters tend to make the higher echelons, although the exploits of Serena and Venus Williams trump most of their male counterparts.

While it is imperative to acknowledge that their tennis journey remains in its infancy, should a similar poll be conducted in two decade’s time then maybe, just maybe, the surname Fruhvirtova may feature prominently.

The Fruhvirtova sisters, Linda and Brenda, are only 14 and 12 years old respectively but they are already making their presence felt to such an extent that the tennis glitterati are sitting up and taking notice of the prodigiously talented duo.

Linda has ruffled many a feather this season, more often that not bruising the egos of considerably older opponents, and she was the youngest player to feature at Wimbledon as she reached the second round at The Junior Championships.

The Czech also progressed to the semi-finals of the prestigious JA Milan in May before making her Junior Grand Slam debut at Roland Garros, while a junior world ranking of No. 22 reflects her standing in the game.

Despite her tender years, Linda, who started playing tennis in Prague aged three, would certainly appear to know her own mind. When asked about her aims for the future, she tells itftennis.com: “To be world No. 1 and win Grand Slams.”

Far from evident in just one, potentially throwaway, line, there is a depth and authenticity to Linda’s self-assuredness. “Roger Federer and Serena Williams are my favourite players, but I don’t model my game on anyone. I play the way I do,” she adds.

Linda also took to the microphone at the closing ceremony of the ITF World Junior Tennis Finals on Saturday following her side’s victory in the girls’ draw and bullishly declared that “after 16 years the trophy is back where it belongs”.

There is a steeliness to her character, too. All week Czech Republic girls’ captain Tomas Josefus insisted that Linda was determined to lead her nation to the top of the podium to exorcise the ghost of defeat in the decisive doubles match in last year’s final against Russia.

She did exactly that, recovering from an injury to her left hand to overcome USA’s No. 1 Clervie Ngounoue and fire Czech Republic into an unassailable lead in the final, before dropping to her knees in celebration on the clay of the TK Plus Centre.

Much of Czech Republic’s success in Prostejov, however, was down to Brenda, who did not drop a set and boasted a 100 per cent record from the 10 matches she contested during the week, all of which inevitably came against older competitors in the 14 and under tournament.

“When I started to play tennis I always played against players who were older than me, so this is normal,” said Brenda, who won the 14 and under category 1 Kungens Kanna & Drottningens Pris event in Stockholm in March.

Perhaps Brenda’s fearless approach stems from her tennis education alongside Linda, something which their father Hynek fondly recalls. “They had some intense battles growing up,” he said. “The younger one always wants to beat the older one, who never wants to lose.

“They compete against each on court only and when they walk off court it is a different story. They motivate each other and are both really supportive of each other.”

The united front Hynek mentions was underlined during the four doubles matches they joined forces to win in Prostejov and the rather touching embrace which greeted victory in the decisive showdown of their semi-final clash against Canada’s Kayla Cross and Victoria Mboko.

But whether playing in singles or as a pairing, the list of people backing the Fruhvirtova sisters to make a serious impact upon the game is growing rapidly. “I have known the sisters since a very early age and they are two totally different players with different styles,” said Josefus.

“Linda is very good from the baseline and hits the ball hard. She is like a Pit Bull from the baseline. Brenda is a different player, very good from the baseline also, but doesn’t have the Pit Bull-style of Linda.

“Two years ago, I watched some of Cori Gauff’s matches at the ITF World Junior Tennis Finals. I expected Cori would become a very good player and I predict a similar outcome for Linda, who has an optimal body for tennis.

“It is the goal of both sisters to play professional tennis and I believe they will. If they stay healthy then, for sure, I believe they will play professionally.”

Maureen Diaz was Josefus’s opposite number on Saturday as her USA girls finished ITF World Junior Tennis runners-up following a Fruhvirtova masterclass in what proved a one-sided final.

“I saw Linda here in 2017 when she was only 12 but you could see the potential in her,” said Diaz. “I have seen Brenda a few times too and they both have great tennis IQ, move well and have good experience through playing a lot of tournaments.

“They seem to know the game well and have a good support network: they have a great chance of making it professionally. A lot of the kids here have a great chance of becoming professional, it’s just a case of how much they can extend that potential. It’s up to Linda and Brenda how big they can become.”

Away from the court, Linda claims that her and Brenda are “always singing”, while Josefus revealed the whole Czech team, which included Nikola Bartunkova, performed a rendition of Meghan Trainor’s Dear Future Husband in celebration following their semi-final triumph.

Josefus, meanwhile, promised to sing Queen’s We are the Champions at the farewell party, an anthem which might become familiar to the Fruhvirtova sisters in the coming years.

Incidentally, independently of Linda, Brenda also declared that her tennis dream was to be “world No. 1 and to win Grand Slams”. Perhaps those intense on-court battles the girls shared growing up might be used to settle some lofty debates and matches going forward.