It’s been a very interesting summer for Southampton so far.

After losing their manager Ronald Koeman to Everton, and with a number of plays set to depart the club this summer; it is quickly becoming very important that Southampton look to rebuild as soon as possible.

It is nothing that the club haven’t done before; having dealt with similar situations for the last few summer transfer windows.

Each time a key player is sold, he is replaced with a player of equal or better quality; and often for a much smaller fee.

Unknown signings have become Southampton’s bread and butter; and they will no doubt continue that trend as they look to rebuild this summer.

Here are five transfer unknowns that Southampton should target..

Djibril Sidibe

Djibril Sidibe is a French defender currently playing for Ligue 1 side Lille.

The 23-year-old is a wall at the back, offering astute defensive prowess and an excellent ability to read the game. The versatile defender is also able to play across the back four.

Arsenal are reportedly interested in the defender, and it is strange that no other club are after him. With the deal still looking a ways away from completion, there is still time for other sides to come in for the Frenchman.

Saints are definitely after some defensive back up, and Sidibe would seemingly be a perfect fit. If a good price can be agreed, Southampton should look to beat Arsenal to his signature.

Sofiane Boufal

Sofiane Boufal is an unknown quantity that Southampton are looking at; and it is easy to see why.

The attacking midfielder, despite being unknown in England, has been in fine form for Lille recently.

Able to play across the attacking line, his versatility is a key trait of his game, and he is also hugely talented on a technical level. He could be utilised as a replacement for the recently departed Sadio Mane.

With Southampton’s interest in the player seemingly concrete, this has all the makings of a future deal.

Ragnar Signurdsson

A player that is attracting lots of attention this summer, Signurdsson was one of the standout players in Iceland’s heroics during the Euro 2016 tournament this summer.

With a host of top European sides looking at him, Southampton would be wise to follow the trend and look into the defender too.

Offering defensive stability to any back line, the Icelandic defender would be a great signing. His transfer fee would likely be low, meaning he would be perfect as a rotational defender for this Southampton side.

Youri Tielemans

This Belgian starlet is destined for big things.

Southampton are a side that have become renowned in recent years for producing some of England’s finest young players, and in Youri Tielemans’ you have a player that has the potential to become one of the worlds best.

With 100 Anderlecht appearances to his name at just 19 years of age, he has more experience than players significantly older in age, and will no doubt make his big move in the next few years.

Offering technical ability and the ability to open up opposition defences, Tielemans would be a perfect fit in the Southampton midfield; and it would give the midfielder the perfect platform on which to build his career before an inevitable big money move away.

Andre Gray

Andre Gray is by no means an unknown name in the lower leagues, having just come off of the back of an unstoppable debut season with Burnley. But to many Premier League fans, they might not be aware of him or just how good he is.

He won the Championship golden boot last year, with a fantastic 23 league goals in 41 appearances, firing Burnley to the Premier League and proving that he is ready to make the step up to the Premier League with his club.

With Pelle set to leave Southampton this summer, the club will no doubt be looking for a striker, and they would struggle to do better than this 25 year old.

The club were reportedly interested in signing him before he arrived at Burnley, but chose not to as they were unsure how well he would adapt. Well he has proven with Burnely that he is more than good enough to make the leap.

Whilst he may be unknown to a lot of Premier League fans right now, this time next year he definitely wont be; and if Southampton still have interest in the striker, now is the time to do the business.