Robson focuses on piling on runs

England hopeful Sam Robson has targeted more big scores for Middlesex to strengthen his claim to international selection this summer.

The Sydney-born 24-year-old lifted his overnight total of 144 to 163 on day three of the County Championship Division One match against Nottinghamshire at Lord's.

Peter Siddle, opening the bowling for Notts, went wicketless and conceded 89 runs in his 25 overs.

Robson is in contention to face Sri Lanka and India for England in their summer and knows the best way to win a first cap is to impress for Middlesex.

"I've just got to trying to get as many scores as I can. That's how I've always approached it. Big scores count and I'll keep on doing my best," Robson said.

"It would have been nice to go on a little bit more, but that happens.

"It's not the end of the world, I'm happy with how I played and pleased to contribute in an important period of the match."

His ton has Middlesex in a commanding position, with Notts leading by 71 with five second-innings wickets in hand heading into the fourth and final day.

In Division Two, Doug Bollinger took five second-innings wickets for Kent to give them hope of victory against Worcestershire.

The NSW Blues left-armer trapped England hopeful Moeen Ali for a golden duck, having had Daryl Mitchell caught behind the ball before.

Bollinger continued to break partnerships, finishing with 5-43 from 19 overs. Kent require a further 215, with seven wickets in hand, on day four for a victory.

Gloucestershire captain Michael Klinger may have been affected by off-field talk about his move to the Western Warriors as he fell for just one in his county's Division Two match against Hampshire.

Klinger had scored 81 in the first innings. Gloucs lead by 190 with one wicket in hand and Hants still to bat their second innings.