Murphy believes defenders would rather play against Morata than Lukaku.
United have so far signed Victor Lindelof and Romelu Lukaku this summer.
Kompany admires Lukaku's self-belief in the face of criticism.
Manchester United boss happy with Romelu Lukaku, but admits the Belgian must prove himself at the top level.
United boss consigned to make just one further signing, despite previously wanting two.
Blues linked with £70m move for the Gabon international.
Lukaku will be expected to build on his 25 league goals from the 2016/17 season.
Mourinho backs Rashford to score more goals in the 2017/18 season.
United have completed deals for Romelu Lukaku and Victor Lindelof so far.
Martial struggled in his second season at Old Trafford while Ibrahimovic scored 28 times.
Adnan Januzaj has a year left in his current contract.
The 35-year-old set to be handed deal until the end of the season.
Lukaku joined United from Everton in a deal worth £100m.
But Borussia Dortmund ready to fight off speculation until the end of the transfer window.
Martial has struggled for regular game time under Jose Mourinho.
The Belgian will wear the number nine shirt left vacant by Zlatan Ibrahimovic.
AS Monaco's Bakayoko is also a target for Manchester United.
Eric Dier has become Manchester United's priority transfer target.
Lacazette joined Arsenal in a club record deal from Lyon as United signed Lukaku from Everton.
Lukaku scored 25 goals in the league for Everton last season.
Jose Mourinho has described prolific Belgian as a "natural fit" for the Red Devils.
Morata has scored 20 goals for Real Madrid last season.