Aaron Ramsey played his first pre-season game of the season
Tottenham, Juventus and Ajax also interested in signing 20-year-old defender.
Walcott is Arsenal's longest serving player following his arrival from Southampton in 2006.
The Arsenal boss insists the club are in the market but refuse to commit to sign back-up defender.
Ibrahimovic will make his competitive debut for United during their Charity Shield game against Leicester City.
Arsenal have signed Granit Xhaka, Takuma Asano and Rob Holding thus far.
Manchester City finished the season in fourth spot last season.
Kelechi Nwakali captained the Nigeria team to lift the Fifa U-17 trophy in Chile in 2015.
The Swede could take up Thierry Henry's role with the club's youth side.
Jack Wilshere is set to return to training next week after recovering from a knee injury.
Spaniard set for top-tier experience after captaining Under-21 side during 2015-2016 season.
Riyad Mahrez scored 17 goals to help take Leicester to the PL title last season.
Shkodran Mustafi is currently in England with Valencia on their pre-season tour.
Nwakali led the Nigeria U17 side in the World Cup in Chile last year.
Mahrez scored 17 goals and provided 11 assists to help Leicester to the PL title in 2015/16.
Walcott has struggled while playing as a central striker.
Draxler joined Wolfsburg from Schalke last summer.
Kelechi Nwakali is the captain of the Nigeria U-20 team.
Arsene Wenger has confirmed that he wants to sign another defender and a striker this transfer window.
Julian Draxler joined Wolfsburg from Schalke during last summer's transfer window.
Chris Sutton says Arsenal will not win the Premier League title until Arsene Wenger steps down.
La Liga side sporting director also admitted they want to sign Napoli centre-back Raul Albiol.