Paul Lambert says full-back has to do more in order to end run of four months without a first-team appearance.
IBTimes UK spoke to the Spaniard following Blues' 2-1 victory at West Ham.
Lukaku's agent Mino Raiola said deal was '99.9999%' done last week.
The Swede was handed the violent conduct charge of an elbow on Tyrone Mings.
Luke Shaw, Bastian Schweinsteiger and Eric Bailly will also miss the first leg of the Europe League last 16.
Sanchez was not included in Arsenal's starting XI in their 3-1 defeat to Liverpool.
Key trio have travelled with French giants for second-leg tie at the Nou Camp.
Sanchez, 28, was surprisingly left out of Arsenal's starting line-up against Liverpool.
The Serbian played an hour in the 5-1 thrashing of Reading.
Niall Quinn expects the Frenchman to sign a new deal - and urges Sanchez to follow suit.
Barcelona face mountainous task in round-of-16 second leg at Camp Nou.
The Blues restored their 10-point Premier League lead thanks to goals from Eden Hazard and Diego Costa.
Pogba has scored four goals in 25 league appearances for United this season.
The Blues restored their 10-point Premier League table lead thanks to Eden Hazard and Diego Costa goals.
Bilic is happy with his current options in Adrian and Darren Randolph.
Gunners must overturn 5-1 deficit to reach the quarter-finals of the Champions League.
Arsenal have to overcome a 5-1 deficit from the first-leg to have a chance of progressing to the last eight.
Zaha rejoined Palace on a permanent transfer in 2015 after a disappointing spell at Manchester United.
Former Gunners favourite believes his compatriot has a 'good profile' to play at the Emirates Stadium.
Eden Hazard and Diego Costa strike in London derby to send Antonio Conte's leaders 10 points clear.
Reports suggested the Chilean was dropped to the bench against Liverpool due to training ground row.
Highly-sought after Lacazette has been in excellent form for Lyon this season.
Catalans wanted the Spanish right-back to replace Aleix Vidal.
Midfielder has comes to the Toffees' attention after scoring 15 goals this season.
The Catalans are close to becoming the first side in Spain to win three doubles in a row.
Duo charged following Manchester United's fiery Premier League clash with Bournemouth on Saturday.
The Germany international missed the Liverpool defeat due to illness.
Jeremy Mathieu and long-term casualty Aleix Vidal remain in treatment room.
Chile international was reportedly involved in a training ground incident last week.
Former Atletico Madrid keeper spoke to IBTimes UK after the 3-2 defeat to Tottenham.