A clean sheet and a goal in his first three games doesn't make bad reading for Virgil Van Dijk's early days at Southampton - stats that will continue to improve as the 24-year-old develops in the Premier League.
Another shrewd signing took place on Transfer Deadline Day for Southampton as they once again had to plug a gap in their defence. Toby Alderweireld's move to Spurs meant Koeman had a job to do again just like the season before, when Dejan Lovren completed a move to Liverpool.
That task was handed to Van Dijk, who made an unnoticed switch for a resourceful £11 million.
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Koeman described the Dutchman's first game as the perfect display, in which Van Dijk helped his defence to a clean sheet, but Koeman would be proven wrong as a fantastic display in the 3-1 defeat to Swansea at the weekend for Van Dijk eclipsed his first game for the Saints and was capped off will a goal.
The reputation of the Dutchman had always been one of little knowledge outside of Glasgow, where he spent two seasons at Celtic. However, a few clips on YouTube of the defenders pace, strength and dead ball ability soon caught the eye of fans south of the border and sooner or later the scouts were interested.
Everton, Sunderland and even Arsenal were all interested in the ball-playing centre-half, whose passing ability and adventurous style made him a highly coveted asset for Premier League sides, but it was Southampton and Koeman who won the race to sign the Dutchman.
The decision to sign for Southampton could well be down to the Dutch connection Van Dijk feels with Koeman, though the ethos put forward by the coaching staff and familiar faces in Fraser Forster and Victor Wanyama will have undoubtedly sped up his settling in.
The speed of the Premier League caught Van Dijk by surprise against Manchester United and will take some getting used to having come from a much less competitive league. However, he has adjusted his feet very quickly and looks like he is fast becoming another stalwart in the Southampton defence.
Van Dijk's big frame yet nimble feet make many wonder why he hadn't been snapped up before, an opinion echoed by many Celtic fans, but with the Dutchman fast adapting to life in the Premier League, it could be a bit of deja vu that Koeman experiences next summer, with the towering centre-back destined for bigger and better things.