The summer transfer window will be an intriguing one at Portsmouth, with the club again looking to win promotion back to the Championship next season.

A tenth place finish in League One means that Pompey are now facing another campaign in third-tier, despite showing plenty of promise at times during the season just gone.

However, it is likely that several players will be moving from Fratton Park over the course of the summer, and they will of course, need to be replaced, if Pompey are to be competitive again next time around.

While that could see the club invest in certain signings, it should not be forgotten that there are a number of players out of contract this summer, who could also be more than useful additions at Fratton Park, for a much reduced financial cost.

So with that in mind, we've taken a look at eight players who are set to become free agents this summer, who could be useful signings for Portsmouth.

With Gavin Bazunu's loan from Manchester City having now expired, Portsmouth are going to need a new goalkeeper between the posts for next season.

One option they could look to in their search to fill that position is Lee Burge, who may find it hard to secure a new deal with Sunderland this summer following his lack of game time this season, especially if the Black Cats win their League One play-off final.

Should that be the case, then a move to another well-backed League One club with aspirations of a Championship return, such as Portsmouth, could be an appealing destination for the 29-year-old.

Another goalkeeping option who could be worth considering for Portsmouth, is Keiren Westwood, who has left QPR following a brief spell with the Championship club.

Westwood is of course a goalkeeper with a great deal of experience, not least at second-tier level, after a number of years playing in that division for Sheffield Wednesday in particular.

That is something that could make him a useful source of guidance and insight for Portsmouth's young 'keeper's, not least Alex Bass, who may feel he has a point to prove as he returns to the club after spending the last few months out on loan at Bradford City.

With Hayden Carter's loan from Blackburn having come to an end, and Sean Raggett's contract set to expire as things stand, a new centre back may be on the agenda for Portsmouth.

One option to consider to take on that role could be Chey Dunkley, who is out of contract with Sheffield Wednesday this summer, and snatching him from a League One rival would be a boost for Portsmouth.

While there could be an element of risk to this given the 30-year-old's recent injury issues, he is one of the third-tier's most reliable options when fit, and has also shown in the past he is more than capable of holding his own in the Championship, so this deal would bring plenty of quality to Fratton Park.

Another centre back option worth considering, who at 22-years-old could see Portsmouth secure a long term asset in defence, is Gillingham's Jack Tucker.

Although the defender has been offered a new contract by the Gills, with his current deal expiring this summer, the club's relegation to League Two this season could make it hard for them to keep hold of him, given he will want to further his career, something which may present an opportunity for Pompey.

Indeed, despite Gillingham's drop out of League One, Tucker has consistently shown he can hold his own at this level, and with plenty more to come as he improves with experience, this could be an exciting signing for Portsmouth.

Another loan departure that potentially leaves a void to be filled is at right-back, while Mahlon Romeo's time at Portsmouth could be coming to an end following his temporary move to the club from Millwall.

One option who could be considered to take over that role is Tommy Smith, with it having already been confirmed that the 30-year-old will be leaving Stoke when his contract with the Potters expires this summer.

That would ensure that Pompey continue to have an option in that position who bring plenty of Championship experience with him, which could well be important in the club's own battle to get back to the second-tier.

With both Louis Thompson and veteran Shaun Williams out of contract at Fratton Park in the summer as things stand, some extra presence in midfield could also be needed at Portsmouth.

One option they could consider to take over that position is Jacob Davenport, who looks set to be released by Blackburn this summer, following a frustrating four years at the club.

Having struggled for opportunities at Ewood Park, the midfielder will certainly feel like he has something to prove, and at 23-years-old, could be a long term option, with the appearances in the Championship he did make for Blackburn, indicating that he does possess plenty of useful talent for this sort of level.

With the likes of Macrus Harness and Ronan Curtis potentially set to generate some speculation surrounding their own futures at Fratton Park as their contracts move towards their expiry, some new wide options could also be needed.

That could mean that Scott Sinclair is one worth considering, with it having already been confirmed that the veteran winger will leave Preston this summer, after two-and-a-half years at Deepdale.

Though his age means this may not be a long term option, Sinclair knows plenty about winning titles in a variety of different scenarios and levels, which could certainly be welcome for Portsmouth as they pursue a return to the Championship.

There are currently no centre forwards contracted to Portsmouth for next season, so that is clearly an area that the club will have to strengthen in the summer.

One such option who should be looked at to fill that role is Vadaine Oliver, who also suffered relegation with Gillingham this season, and has already confirmed he will be leaving Priestfield in the summer.

With 27 goals in League One over the last two seasons, Oliver certainly knows where the net is at this level, and he could thrive off the service provided to him at Fratton Park, meaning this is a deal that could provide Pompey with the sort of attacking firepower they need to get out of this division.