​Real Madrid’s transfer business may be far from finished despite an already busy summer.After strengthening Jose Mourinho’s squad with four new arrivals, the Spanish giants are still in a strong financial position to pursue further reinforcements before the transfer window closes.AdvertisementAdvertisementAdvertisementAccording to Defensa Central, citing journalist Miguel Serrano, Los Blancos have more than €170 million available to invest in additional signings.The figure comes after factoring in the club’s transfer activity so far, suggesting there is still significant room for Florentino Perez to back Mourinho in the market if the right opportunities arise.Real Madrid have already welcomed Marc Cucurella, Bernardo Silva, Denzel Dumfries and Ibrahima Konate this summer, but the club’s recruitment drive does not appear to be over.Real Madrid have already made four signings. (Photo by Lars Baron/Getty Images)AdvertisementAdvertisementAdvertisementIt must be remembered that the club has generated €112 million through completed player sales, leaving them with a positive transfer balance once incoming deals are taken into account.Added to that is the €150 million Madrid had previously earmarked for a move for Julian Alvarez before that approach was rejected.Taken together, those figures leave the club with more than €170 million in spending power should they decide to return to the market before the deadline.While the financial resources are available, the next signing could depend on whether Mourinho’s sporting priorities align with those of club president Florentino Perez.Denzel Dumfries has joined from Inter Milan. (Photo by Molly Darlington/Getty Images)AdvertisementAdvertisementAdvertisementThe Portuguese manager is understood to have requested another centre-back and a midfielder, but Perez is still said to favour a move for Michael Olise, whom he views as the next marquee addition.Serrano also believes more changes are on the horizon before the transfer window shuts.“The Real Madrid squad today won’t be the same squad on September 1st,” he said.With several weeks still remaining in the transfer market, it is safe to say that Real Madrid are quite determined to keep their options open rather than rushing into another major deal.