The bounce isn't that uneven for a fourth day pitch, so that's good news for the batsmen. From the bowler's perspective, there is enough bounce in it to keep them interested.
Lyon has been getting that length between slightly short and very full, on a few occasions and when he is getting the landing rights for that particular length, he has caused problems for the batsmen - the sweep could lead to a top-edge and to play back would be a guessing game about the amount of turn.
The question is whether Lyon can find that length on a more regular basis to cause more problem.
In the meantime, O'Keefe has just sent down a testing maiden.
1/80 in 29
Oh wow, whatever happened there. Shehzad was going for a sweep and missed it. And hits the pads outside the off and just misses the off-stump before rolling over for a bye.
Lyon follows it up with a poor ball, a full-toss that has been drilled through backward point for three. One of the very rare rank bad balls from Lyon.
1/79 in the 28th
A second single to that same sweep from Younis. The only run off the O'Keefe over.
1/74 in 27