Arsenal cruised to victory over Premier League new-boys Leeds to make it two wins from two at the start of the new season.
The Emirates Stadium was rocking right before kick-off as Arsenal presented new signing Eberechi Eze to the crowd. However, it took a while for his new team-mates to find their groove.
In fact, the Gunners had goalkeeper David Raya to thank as he made a fine save to deny Pascal Struijk putting the visitors ahead from a corner.
Although the set-piece kings did break the deadlock just after the half hour mark when Arsenal defender Jurrien Timber superbly headed home Declan Rice’s cross.
The hosts doubled their lead on the stroke of half-time when Timber turned provider for Bukayo Saka - wearing the captain’s armband after Martin Odgeaard limped off - beat Lucas Perri at his near post with a powerful finish.
Viktor Gyokeres, who scored a remarkable 97 goals in 102 matches for Sporting CP, fluffed a brilliant opportunity to open his Arsenal account in the first-half when, unmarked and just eight yards out, he dragged his shot wide.
But the Sweden international demonstrated why Arsenal splashed the cash on bringing him to the Emirates within three minutes of the second half.
Riccardo Calafiori found Arsenal's new striker on the near touchline. Seven clinical touches followed as Gyokeres powered into the Leeds penalty area before thrashing a right-footed shot low and hard past Perri.
After Odegaard was withdrawn in the first half, Saka was then replaced on 54 minutes after he went down nursing his left hamstring.
Saka missed almost four months of last season following surgery on his other hamstring and he was in obvious discomfort as he walked off.
A blow to Arsenal, the extent of which is unclear at this stage, but Timber raised the mood again inside the Emirates when he doubled his tally on 56 minutes.
Leeds failed to deal with Timber's header and the defender poked home from a matter of yards to land Arsenal's 33rd goal from a corner since the start of last season - 13 more than any other team.
Max Dowman, who became only the third player under the age of 16 to play in the Premier League when he was introduced in the 63rd minute, showed why he is so highly thought of with one mazy run, and two long-range efforts before he was upended by Anton Stach in the penalty area in stoppage time.
Gyokeres converted the resulting spot-kick to afford Arsenal an early sight of the title summit.
Additional reporting by PA.
