According to the Sunday papers Saints are about to complete the signing of Ron Vlaar who is available on a free transfer after turning down a new contract at Villa Park.
Ronald Koeman looks set to land yet another. Dutchman if as is being predicted Ron Vlaar is signed in the next few days, Vlaar like Jordy Clasie played for Koeman at Feyenoord and only last year was rated one of the best central defenders of the 2014 World Cup in Brazil.
The issue with Vlaar though is one of fitness, last season he struggled with calf and knee problems meaning that he played less than half of the game he could of for Villa. However given that he will not cost a transfer fee, he could be a good investment, although he might not be the last central defender to arrive this summer.
Ronald Koeman has been wise in the transfer market this summer so far and made several key signings but at a far less cost than the club have so far received for Schneiderlin & Clyne, Les Reed is on record as saying that the club won't buy just for the sake of buying, but you have the feeling that they may yet have something up their sleeve.