Emma Raducanu is still yet to replace the tennis coach who guided her through her maiden Grand Slam title in September. 

The Brit became her nation's new number one after her triumph at the US Open, where she beat Canada's Leylah Fernandez in a thrilling all-teenage final.

But after returning home from the States, Raducanu announced she had parted ways with coach Andrew Richardson, who had come on board just a few months prior.

Richardson joined the Raducanu team after she made her Grand Slam debut at Wimbledon, where she reached the quarter-finals after being drawn as a wildcard. 

Her next major tournament would be the US Open, where she made history by becoming the first ever qualifier to win a Slam final. 

Despite achieving such huge success in a short amount of time with Richardson, the 18-year-old announced she was looking for a coach with more Grand Slam experience as she looked towards the next chapter in her career.

So far, Raducanu's search has not proven fruitful. Since her victory at Flushing Meadows, she has played just four competitive matches and won two. An early exit from the Indian Wells Open was her first appearance on court since being US Open champion.

The last coach known to be working with Raducanu was Esteban Carril, Johanna Konta's former mentor. The Spaniard was brought on board on a trial basis as the Brit's scouting continues.

There's been a lot of speculation over who Raducanu will, or should, appoint next and Greg Rusedski is one of the latest to have his say.

The former British number one has tipped her to achieve incredible things in her career as she continues her rapid rise into the spotlight.

"I think she's going to be a multiple Grand Slam champion," he told Sky Sports. "I think she has the potential to be a world No 1. What she has done in her first two majors, there's very few that have done.

"There's only three other female players that have got to the fourth round or better in both events in their first two majors. Chris Evert, who was world number one and [a] multiple Slam winner. Jennifer Capriati, world number one and multiple Slam winner. And Monica Seles, so she joins that category of elite superstars.

"We've never seen this in the game before, for someone to come through qualifying and go on to win a major, so her future is going to be exceptional so long as she can stay healthy, put the right team around her. I think her future is going to be incredible."

Rusedski then expanded on Raducanu's coaching situation and addressed the rumours of her linking up with Australian mentor and analyst Darren Cahill.

The 56-year-old won two major titles during his playing career and reached an all-time high of tenth in the world rankings. However, he never reached further than the semi-final stage of a Grand Slam tournament.

"If she could tie up with that sort of coach on a long-term basis, I think that would be a great thing," Rusedski said. "But she's got to find the right mix and the right person for herself.

"Darren has got to want to do the job. He's got his television work he enjoys doing. He's got his family and he's living in Australia these days so you've got to find a way to convince him to take it.

"Knowing Darren, he'd want a long-term commitment and that's something you look for as a coach. He's got the pedigree, he's got the CV, and he's done it all in tennis so he'd be probably at the top of the list."