Sir Alex Ferguson is monitoring the Icelandic international who has starred on loan with Swansea this season
Sir Alex Ferguson has been monitoring the midfielder, who is enjoying an outstanding campaign at the Liberty Stadium after arriving from German club Hoffenheim in January.
United assistant Mike Phelan was sent to the Reebok Stadium last week to watch Swansea, with the champions set to face Brendan Rodgers’ side next weekend.
And he was accompanied by Martin Ferguson, the brother of United’s boss and the club’s chief scout.
His brief was to run the rule over Sigurdsson – an Icelandic international – and he was impressed with what he saw.
United are looking for midfield recruits after being forced to bring Paul Scholes out of retirement in January because of a lack of quality and injuries.
Sigurdsson, a clean striker of the ball, has scored seven times in 14 appearances for the Swans.
He also enjoyed a healthy strike-rate of 18 goals in 42 appearances during two years with Reading before moving to Hoffenheim for £7m in 2010.
The German club value Sigurdsson at £10m – but they may look to squeeze more money out of United if the champions firm up their interest.