Luke Wells makes Chris Tremlett toil on his return with a patient century Chris Tremlett continued his comeback with 16 wicketless overs on a tough day for bowling dominated by Luke Wells, who underlined his burgeoning reputation with a third successive century against Surrey. Wells, the son of former England batsman Alan, is a bright prospect and showed admirable maturity in a young player by carefully constructing an innings against a strong Surrey attack. Admittedly the conditions were in his favour with a docile pitch and the sun shining but cricket at the Oval this summer has been attritional and required patience and concentration from batsmen. Wells supplied both, making an unbeaten 108 which included one straight six off Gareth Batty but generally contained few risks. Tremlett bowled four spells of four overs each but apart from one loud appeal for a catch behind off Wells when he had made 11 and some lively deliveries with the new ball, it was generally a day for him to become reacquainted with bowling. He looked stiff in the final session and his last spell was down on pace as the exertions of a first cricket match since last July took a toll. The key to judging his fitness will come this morning when the aches and pains should have lifted and the new ball is due. Tremlett's most eye-catching contribution of the day was hooking Chris Jordan out of the ground for six, prompting the umpires to call for a replacement ball which knocked over his stumps one delivery later. Wells and Mike Yardy added 76 cautious runs in the afternoon before Yardy clipped a catch to leg slip off Batty. Wells and Ed Joyce added 104 in the final session without any alarms. It was Schools Day at the Oval and more than 5,000 children were invited to the ground and Kevin Pietersen risked adding writer's cramp to his injury problems holding a long autograph signing session before lunch. He was happy to tell the young fans he intends to be fit for the Ashes and was walking around the ground without a leg brace in sight.