The US Under-23 international midfielder got his first extended taste of senior football on loan at Rangers last season.
Serie A side Lazio are keen on the Frenchman's signature.
Valencia has rapidly fallen out of favour at the Hammers under Slaven Bilic and looks set to complete his exit.
The Reds have spent heavily on improving their forward options this summer.
The Tottenham Hotspur boss will not be bringing in any more central defenders this summer.
Warburton has been a hit at Ibrox since taking charge last season.
Leeds United have been linked with some interesting targets in recent days.
The Swedish star could feature in the Red Devils' match against Galatasaray in Gothenburg this Saturday.
Mark Warburton claims there is no interest from Rangers in striker Robin van Persie.
Swansea City are reportedly looking to bolster their attacking lineup with the signing of Peter Crouch.
Credit Suisse, the Swiss bank which is in the middle of major restructuring, reported a surprise profit for the second quarter of 2016 on Thursday.
France's biggest bank, BNP Paribas, posted better-than-expected second-quarter profit on Thursday, even as its retail bank struggled.
Goldman Sachs “crossed the line and established a close, trusting, personal relationship” with officials during Moammar Al Qaddafi’s regime, lawyers for Libya’s $60bn wealth fund said in closing arguments during the final week of a London trial.