Both these teams generally like to score early 58% of Arsenal's first goals scored have been before the 20 minute mark while they've also conceded their first goal in 21% of their games before this time. Discounting the games where no goals were scored against Arsenal, just under 50% of the goals scored by the opposition were within the 20 minute mark.
Leeds have also scored the first goal in 29% of their games and conceded the first goal in 24% of their games before the 20 minute mark. Discounting games when Leeds have failed to score, their first goal percentage in the first 20 minutes is roughly 38%. Discounting the games where teams have failed to score against Leeds, they've conceded their first goals roughly 33% of the time before the 20th minute.
When these teams do score, they generally score early.
Time of 1st Goal - 25th minute or before @ 2.05 (Better, BetDirect, StanJames) - 2 points