Tim Sherwood is believed to have funds at his disposal to secure a big arrival before Friday’s transfer deadline passes, and is keen on the versatile Spaniard.
The 21-year-old has long been hailed as one of La Liga’s finest young players, after establishing himself as a key member of Athletic’s side domestically and playing a key role in their run to the 2011/12 Europa League final.
Although Muniain – who is rated highly by his employers – has a release clause just north of £30m, Spurs are confident that they can snap up the starlet for a lower figure.
Despite his age, the one-time Spain international has already racked up close to 150 first-team appearances with Athletic and is regarded as an experienced player within their current squad.
A move may be difficult to conclude this week, with Muniain potentially keen to stay put in the build-up to the World Cup.
Sherwood has also been linked with Real Betis winger Alvaro Vadillo.
The 19-year-old ace is also said to be on the radar of Arsenal, but some rumours suggest Tottenham are confident of sealing a deal.