And on top of that Dragovic, Toprak's designated successor, hasn't impressed at all this season, so they'd be mad to sell their one (defensively) solid defender, especially since they will probably have a hard time keeping their squad together already with out EL/CL football: Brandt (overrated a f, but might suit Klopp's football) has a €20m release clause for 2018, Kampl supposedly has drawn interest from Atletico, Chicharito is likely to be sold if he doesn't extend his contract and Calhanoglu seems to be fishing for a transfer, too.
So I agree, unless he has some sort of release clause that is yet to be revealed, Tah will stay put this summer.