The Spanish centre-back won two Europa League titles during his time at Atletico Madrid and also has a pair of international caps to his name.
Dominguez, 26, joined Gladbach from Atletico Madrid in June 2012 and has since made 96 total appearances for the Bundesliga outfit, while featuring at either centre-half or left-back.
However, the Spaniard is now reported to be in dispute with the club over the treatment of his recent back problems, which forced him to miss several games during last season’s run-in and have kept him sidelined for the start of this term.
Now working on his rehab back in Spain, Goal Deutschland’s report claims that the Madrid-native could be heading for pastures new in the coming weeks and names both Villa and Napoli as potential destinations.
Gladbach are believed to want between £4 million and £5 million for their unsettled defender, whose current contract runs until 2017, and have also bolstered their squad in the meantime with the signing of the versatile Nico Schulz from Hertha Berlin.
Villa themselves have Micah Richards and Ciaran Clark entrenched as their first-choice centre-back pairing but recent reports have suggested that manager Tim Sherwood is looking for additional cover.
Jores Okore and Nathan Baker are solid backups but both have struggled with injuries throughout their claret and blue careers, while the experienced Philippe Senderos has been linked with a move to the Turkish Super Lig of late [h/t Eurosport].
Southampton’s Jose Fonte and West Bromwich Albion’s Joleon Lescott have been named as two possible targets as a result [h/t Mirror, Birmingham Mail] but, with neither club willing to sell, Dominguez could well be a much more realistic option.
The Atletico product, who made his professional debut for the La Liga side in 2008, has a great deal of experience under his belt at this stage of his career and also been a part of two Europa League-winning sides in 2010 and 2012.
He even has two senior international caps to his name and, as an added bonus, speaks fluent English, having attended a British curriculum school while growing up in Madrid.