The Premier League season is in full flow and plenty of summer signings are already making a big impact for their new clubs.

Some of the league’s high-profile incomings are proving their worth, but there are plenty of lesser-heralded names who have unexpectedly impressed, too.

Ahead of Matchday 10 in the Premier League, we pick out the best-performing summer additions so far.

Jack Grealish (Manchester City)

When Manchester spent £100million to sign Jack Grealish from Aston Villa, there was a question mark over whether he could live up to the billing of being the Premier League's most expensive player.

The undisputed main man at Villa, the 26-year-old had to adjust to being one of many big-name stars at City.

But he has dealt with the step-up to Pep Guardiola’s side with ease and is already a key man for the Citizens.

The England star has started every Premier League game and has been a constant threat on the left of City’s attack.

Grealish will no doubt add to the two goals and three assists he has in all competitions as he continues to further gel with his new team-mates.

Andros Townsend (Everton)

A total spend of just £1.8m on summer signings did not do much to raise excitement levels at Everton ahead of the new season.

But among the four players brought in were Demarai Gray and Andros Townsend, who have spearheaded a surprisingly strong start for Rafa Benitez’s men.

Either one of those could have made this list, but it is free signing Townsend who edges it.

The former Crystal Palace man’s three goals is already more than he managed in his previous two Premier League seasons combined and his fine form has helped the Toffees battle in the top half.

Fans will hope his trademark long-range goal against Burnley and a fine finish at Old Trafford are a sign of plenty more to come.

Aaron Ramsdale (Arsenal)

Arsenal were the top flight’s biggest spenders over the summer, splurging nearly £150m on an overhaul of their squad.

Some thought the £30m on goalkeeper Aaron Ramsdale to seemingly provide competition for Bernd Leno between the sticks could have been better spent elsewhere.

But the former Sheffield United stopper has done plenty more than just warm-up the German’s gloves.

After shipping nine goals in their first three games with Leno in goal, Ramsdale’s introduction has sparked a resurgence in Arsenal’s fortunes.

The Gunners are yet to taste defeat in six Premier League games with the 23-year-old in goal, and some impressive displays have seen him concede just four times.

Hwang Hee-chan (Wolves)

A lesser-known arrival, Hwang Hee-chan has made a flying start in England since his loan switch from RB Leipzig.

The South Korean made the perfect start by scoring just 20 minutes into his Wolves career after being introduced as a substitute against Watford, and he has not looked back since.

The 25-year-old forward has netted a further three goals in six top flight appearances, easing the burden on returning striker Raul Jimenez following his long-term lay-off.

Hwang’s tendency to use his pace to run in behind has given the Midlands outfit a different dimension this season as new manager Bruno Lage looks to remould their style of play.

If he continues in this vein, Wolves will not think twice about exercising their option to buy the forward next summer.

Cristiano Ronaldo (Manchester United)

Manchester United’s difficulties this season are well documented — but without Cristiano Ronaldo they may have struggled even further.

Though the Portuguese has flattered to deceive at times, he has also put in match-winning displays to rescue the Red Devils on more than one occasion already.

He scored dramatic winners in United’s last two Champions League games, while three further strikes in the Premier League takes his tally to six goals in 10 games across all competitions.

At 36, the legendary forward is showing no signs of slowing up and will be determined to lift United out of the troublesome period they are suffering right now.

Adding to his goal tally against Tottenham on Sunday could be just what is needed to ease the pressure on his manager Ole Gunnar Solskjaer.