Fiorentina are looking to offload several players this summer in order to trim their squad and the Colombia worldwide is believed to be on the cull list.
Capped 88 times by Colombia, Sanchez would add experience to a position where West Ham do not have depth.
If West Ham complete the deal before Thursday's transfer deadline day then the 29-year-old will become the club's ninth signing of the summer and will take the total spending close to £100m.
With further midfield signings on the agenda, West Ham could be tempted to cash in.
Govt Intends to Call 8 More Witnesses in Manafort Trial
His defence team is seeking to pin the blame on Gates, who they say was responsible for day-to-day operations of the business. Manafort's political work included advising Viktor Yanukovich on policy after he won the Ukrainian presidency, Gates said.
‘Superman’ Actress Margot Kidder’s Cause of Death Released
The entertainment site quoted the Park County Coroner as saying that Kidder died from an intentional drug and alcohol overdose. McGuane said she found relief knowing that the truth about her mother's death was finally known to the public.
New Oscars "Popular Film" category to be introduced at the 2019 show
As a effect , the United Kingdom equivalent - the BAFTA Film Awards - are likely to take place earlier in the year from 2020. Black Panther is a bit different in that regard, as there was already hope that it would score some nominations on its own.
Perez previously played with Wilshere at Arsenal and the duo look set to reunite at the London Stadium for the new season.
And new boss Pellegrini is looking to make former Aston Villa midfielder Carlos Sanchez his 10th - and final - capture of the window.
Perez, who has signed a three-year deal, spent just two years at the Emirates Stadium - one of those out on loan at Deportivo - and scored seven goals in 21 appearances.
Sanchez spent second half of last season on loan at Espanyol and his contract with Fiorentina expires at the end of next season.