Manchester United made a mistake not triggering trigger Toby Alderweireld's release clause because he would have been a "real force" at Old Trafford.
That's the opinion of former Red Devils striker Louis Saha, who says it's a mystery that United snubbed signing the Belgium international.
"Why United didn't trigger Alderweireld's release clause is a complete mystery to me," Saha told Bwin.
"He's been excellent for Tottenham and would have instantly strengthened United's defence.
"When you look at the money United have spent on defenders this summer, they could have got themselves an absolute bargain who still has a lot of years of football to play.
"United clearly made Maguire the main target, but the pair could have been a real force together."