Palace showed no sign of getting to grips with Arsenal, but they managed to avoid falling further behind before the break - Ozil tried to square to Sanchez when through on goal, only to get it all wrong.
Can Arsenal really afford to sell Sanchez? .
"Overall it was a convincing win even though in the second half it was harder than the first". A brilliant football player. Sbas: Mcarthur 6, Sako 6, Fosu-Mensah 6. Subs: Maitland-Niles 6, Coquelin 6.
On paper, this fixture has an Arsenal victory written all over it, given the attacking talents at Wenger's disposal as well as Palace's struggles to keep clean sheets at Selhurst Park.
The visitors failed to make the most of their chances while they were on top, though, and Palace punished them early in the second period - Andros Townsend with the finish after excellent play from Wilfried Zaha.
Defender Calum Chambers was recalled for clash as Arsenal switched to a back three
30' - Kolasinac finds Sanchez, who slides a fine pass into the box for Ozil, arriving with ideal timing; six yards out, he flicks hard, and Speroni does well to save.
"I can only repeat what I've said until now and I've said it many times, so I won't repeat".
Arsenal's silky German Maestro frequently pops up in the number 10 role, drifting behind the striker and pulling strings in between the lines of midfield and attack, meaning that Palace's Serbian stalwart Luka Milivojevic will be the unlucky man facing Ozil come Thursday night.
When he half-heartedly cleared a corner to Calum Chambers, the defender returned possession to the Palace box and watched as Lacazette and Sanchez combined to create space for the latter to strike into the bottom left corner. Wislhere, given time on halfway, lifts a wondrous pass over the top for Sanchez, who takes it beautifully on his knee, opens his body, and slips a finish past Speroni.More news: Virginia officials postpone draw to decide tied statehouse election