Luiz is now in his second spell with the Blues, having initially joined from Benfica in 2011 before moving to France with Paris Saint-Germain, and eventually returning to west London ahead of the 2016/17 campaign. L'Equipe also mention that the 32-year-old skipped Chelsea training in an effort to heighten his chances of moving, with contact having already been made by both parties.
"It is what it is", Lampard said of the transfer restrictions.
The manager said: "We had some conversations over the last week, honest ones and the conclusion was that he should move on".
'There certainly wasn't any strikes. And in terms of fall-outs, no, there weren't. There were honest conversations. The signings of Kieran Tierney and David Luiz will no doubt improve our defence this season but when you consider that Tierney, Rob Holding and Hector Bellerin are still not match fit, it could be a good few weeks before Emery has his expected first choice back four. The club did everything to get the best players to help us and to make our squad stronger.
"We are going to start on Sunday and.it's the first way for us to achieve our targets and objectives to be in the top four, but we know it's going to be hard".
"Lacazette trained yesterday (Thursday) and today (Friday), but I don't know now if he can play on Sunday".
As for Arsenal, they found a more than able replacement for Laurent Koscielny, who moved to Bordeaux this summer.
"We are going to start Sunday with players who I am very convinced can perform now at 100 percent", Emery added. In my life, I've always liked to do some challenges.
The Scottish champions landed their biggest transfer income for the second summer running after selling Tierney to Arsenal for £25m, 12 months after they banked about £20m for Moussa Dembele.
Ever since he took over at the club, Unai Emery has divided opinion on whether he is the right man for the job and many feel that there wasn't much of an improvement last season. That was just how this situation was'. He left without warning and also during a testing time for the Blues.
The 41-year-old, who will make a late call on N'Golo Kante's knee problem for the game at Old Trafford, said winger Callum Hudson-Odoi is training following an Achilles tendon injury.
Chelsea broke their club policy of only offering players over the age of 30 one year extensions for by offering Luiz a two-year deal earlier this year.
'No, on Callum there's not.
It's there that the Scotland worldwide was overheard talking to Holding about when he'll make his debut for his new club. We hope Callum stays, simple as that, ' replied Lampard when asked if there was an update on Hudson-Odoi.