Brendan Rodgers
Liverpool manager Brendan Rodgers has promised more arrivals at Anfield this summer. (Reuters)

Liverpool manager Brendan Rodgers believes he has successfully strengthened his squad during this transfer window and will now turn his attention to signing players capable of having starring roles in his first XI.

The Reds have wasted little time in boosting their options across the park, having already secured the signatures of Spanish attackers Luis Alberto and Iago Aspas, defender Kolo Toure and goalkeeper Simon Mignolet from Sunderland.

But the former Swansea City boss has indicated the club's real summer spending has not begun yet, as he targets players capable of lifting the club back into Champions League contention.

"Our recruitment team are doing a great job behind the scenes in compiling lists of players that we can afford and might be available for us," Rodgers told Liverpool's official website.

"What we've done in the early part of the summer is to improve the squad. That is something I feel we've done with the players we've brought in.

"Now what's important over the next three to five weeks is improving the team. That is something the club is working very hard at.

"I'm sure by the time the end of August comes we will be ready and we'll have a terrific squad ready to challenge."

After finishing seventh last season, Liverpool will still be expected to add some established names to their ranks in order to close the gap on Manchester United, Manchester City, Chelsea and Arsenal.

The Reds narrowly missed on former Shakhtar Donetsk attacking midfielder Henrikh Mkhitaryan who joined Champions League runners up Borussia Dortmund for £23.6m, despite seemingly being identified as a priority target. The likelihood of last season's top scorer Luis Suarez leaving the club is also increasing as the Uruguayan continues to openly discuss his options away from the red half of Merseyside.

Replacing the unsettled forward is likely to be a high priority for Rodgers, who has identified Galatasaray forward Burak Yilmaz as a possible replacement, Sky Sports report.

Although the 27-year-old's record of 32 goals in 39 appearances for the Turkish giants last season would appear to fit him with an expensive price tag, the club's president Unal Aysal has already revealed they would be willing to sell for the right price.