Lukaku, 23, turned down a new five-year deal worth a reported £140,000 per week - the most lucrative in Everton history - last week.
Calvert-Lewin's maiden Premier League goal put the hosts ahead early on, though an injury to Morgan Schneiderlin resulted in a stuttering display from the Toffees.
Rio Ferdinand believes Everton should sell Romelu Lukaku in the summer transfer window as the look to cash in the maximum transfer fee possible. There was still time for Lukaku to pounce for a quickfire brace in stoppage time, taking his league goal tally for the season to a chart-topping 21.
"He is a really important player for us, it gives us problems in the next games as well", said Silva of Huddlestone's pending absence. But you need to respect your contract.
Everton last won a league title in the 1986-87 season, when they were crowned champions of the old First Division, and the club's last major trophy was the 1994-95 FA Cup.
"Of course we like to keep best players and we will do the maximum to keep these players".
"But the final decision will be with the player himself". "But the future has to be written", he said. But we as players we want the fans talking about us instead of us talking about them. That's what I know from the board. He has been excellent since signing from United in January, so good in fact, you begin to question why United allowed a player in his peak years to leave. Lukaku who joined Everton from Chelsea for a club record £28m in 2014, has also been linked to a reunion with former his former Blues boss Jose Mourinho at Manchester United.