Brighton were left to rue several missed opportunities as Arsenal claimed a point at Amex Stadium.
Graham Potter's side were more comfortable and confident in possession but failed to turn their first-half dominance into goals, with Dan Burn heading the Seagulls' best opportunity over the crossbar from point-blank range.
Leandro Trossard and Neal Maupay were also guilty of missing the target from promising positions, while Shane Duffy headed against the side-netting from Pascal Gross's corner.
The Gunners' best first-half opportunity fell to Pierre-Emerick Aubameyang, who nodded against the outside of the post from Bukayo Saka's looping cross.