The amount of players in the agreement makes it one of the most interesting transfers of the summer, but which side got the better end of the deal?
|Team||Apps||Mins||Touches per game||Pass accuracy (%)||Total shots||Shots on target||Assists||Goals|
First, a look at the two outfield players who swapped clubs. At 24 and 21 respectively, Sigurdsson and Davies are both young players yet to hit their prime and each fills a need for their new club. Spurs have been looking for a left-back to supplant Benoit Assou-Ekotto, while Swansea's midfield requires a creative fulcrum.
Davies was very impressive in the Premier League last season, recording over 70 touches per game with a high pass accuracy. For a full back he got forward well, but he will be expected to contribute more assists as he takes the step up with Spurs next season.
Sigurdsson, on the other hand, faced a struggle to make an impact with the abundance of attacking midfielders in Tottenham's squad last year, and as a result his statistics took a hit.
The Icelandic midfielder found it tough to get into games - 31 touches per game is simply not enough for a creative midfielder - and while his passing was accurate he failed to record an assist all season.
He remains an excellent goal-scoring midfielder, however, and Swansea will be banking on him to rediscover the excellent form he showed when he played for them in 2012.
|Team||Tackles made||Tackles won||Aerial duels lost||Aerial duels won||Clearances||Interceptions||Errors leading to goal|
Davies was solid but unspectacular defensively last season. He won a good amount of his tackles and made plenty of clearances and interceptions, but his ability in aerial duels is worrying. Those figures do not stack up with Bacary Sagna's, for example, who won 122 aerial battles last season and lost 58.
Top Premier League full backs are expected to hold their own in the air, and if Davies does not improve this part of his game teams will look to exploit it. At his age, however, he still has time to develop his physicality.
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The second part of the deal to evaluate is the transfer of Michel Vorm for a fee of around £3.5 million. Vorm is one of the most underrated goalkeepers in the Premier League, but the move is somewhat baffling as Tottenham already have Huge Lloris, one of the world's top 'keepers.
Vorm will likely spend much of his Tottenham career on the bench, and when compared with Lloris his statistics show why.
The Dutchman missed much of last season through injury but was very solid when he did feature, making almost as many saves and conceding less goals per game than Lloris. He was more efficient at claiming crosses, but did not punch nearly as often.
Where Lloris excels above Vorm and any other goalkeeper in the league, however, is in his ability to rush out of his area to make a clearance. He did this 55 times last season to Vorm's 6, and this is a big reason why the Frenchman will remain as Spurs' number one next season.
The question is whether Tottenham were wise to pay £3.5 million for a back-up goalkeeper, and whether Swansea got true value for money for their number one.
In reality, less than £4 million is not much to stump up for a quality goalkeeper, and Swansea fans will surely feel that the club should have demanded a larger fee for Vorm.
Furthermore, Tottenham probably got the better of the Davies-Sigurdsson swap deal simply because they unloaded a player who would have seen limited playing time and received potentially one of the Premier League's top full backs.
Sigurdsson will certainly be effective for Swansea, but in a few years time we could look back at this deal and wonder how Spurs picked up an excellent left back and Vorm, a Dutch international, for such a small price.