But he is sure to have been heavily distracted by interest from Premier League giants United.
Sean Longstaff spent loan periods at English League One club Blackpool and Scottish Premiership side Kilmarnock.
The 21-year-old showcased the kind of traits rarely-possessed by a player of such tender years, with his increasingly-prominent role in Newcastle's midfield ranks having only been cut short by a season-ending knee injury.
Manchester United value the 21-year-old at closer to £20m and they are weighing up what they are willing to offer for the player.
Manchester United were expected to make a host of transfers much before departing to Australia for their pre-season tour.
The north-east club are said to want £50m for the midfielder.
With Red Devils boss Ole Gunnar Solskjaer looking to attract the best, young British talent, Longstaff is understood to be a primary target for the Norwegian.
Although United recognise they are operating in an inflated market and there is a premium on young British players, there is some concern that there is nearly an additional tax on players they are interested in signing.
Manchester United are in the market to sign a centre-half after they conceded more goals than Liverpool FC and Manchester City combined last season.
The Tyneside outfit have slapped an outrageous £50 million price tag on Longstaff, having seen Manchester United shell out a similar fee to sign Wan-Bissaka from Crystal Palace this summer.
Leicester are demanding £90m for the England centre-back but United are hoping to strike a deal around the £75m figure that Liverpool paid Southampton for Virgil van Dijk previous year.