My guess is that Spurs want two CB's - atm possibly the two lead candidates are Torres and Bremer,
However if either don't want to come our back up is Lenglet - but we've publicised his loan to try to get both our top choices to make up their minds - and if one of them doesn't come then Lenglet comes
My guess would be Lenglet + 1.
...Or just Lenglet if no-one else we want is available.