Southampton have had a topsy-turvy season thus far and Ronald Koeman must be considering using the remaining days of this transfer window to add to his squad.

Terence Kongolo, the 21 year old Dutch centre-back, is one player that the Dutch manager should be looking at and, whilst Southampton aren't in the relegation battle, Koeman needs to make sure that he can fix some of their defensive issues.

In this unpredictable season, the Saints will have hoped for a European charge, but the south coast club will be happy to stay in mid-table mediocrity with the way that their campaign has gone so far.

Aside from their shock thrashing of Arsenal, Southampton have had a very ordinary campaign and will be slightly concerned about their form - despite winning at Old Trafford recently.

Ronald Koeman is likely to attract the interest of big clubs, so Southampton will be hoping to make the most of their manager whilst he is still fully committed to the club.

Here are several reasons why Terence Kongolo is the ideal man for Saints...

Give Ryan a hand

Swansea City v Southampton - Barclays Premier League

Kongolo has, largely, played as left-back during this campaign. The Dutchman, who is equally adept at centre-back, would be able to cover for Ryan Bertrand at centre-back and has shown himself to be a threat down the left-wing.

Registering over a key pass per game, Kongolo will contribute to the playmaking efforts of Dusan Tadic and James Ward-Prowse.

Bold Fonte

Jose Fonte

Jose Fonte, who is the stalwart of the Southampton defence, only has a couple of years left at the highest level and Kongolo could be the ideal man to form a long-term central defensive partnership with Virgil van Dijk.

Old head, young shoulders

For a 21-year-old, Kongolo is very composed in possession and rarely loses his focus.

Averaging over 3 tackles per game, Kongolo's role at left-back has not effected his development as a defender.

Years and years

Koeman

Kongolo, who turns 22 next month, comfortably has another decade of top quality performances in him.

Defenders, unlike forwards, will often peak around 30 and Southampton could be sure to get the best out of this youngster.

Start at the back..

Any team building for long-term success needs to make sure they have the correct defensive foundations.

Kongolo would be a solid addition to the Saints back line and could build a long-term partnership with Van Dijk. There is no better proof of this point than the strength of the side's defence when they were in their best form.