HSBC CHAMPIONS CHALLENGE, SHANGHAI
Dates: 4 - 7 November Coverage: Latest scores on BBC Sport website; reports on BBC Radio 5 live;
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Westwood took over the world number one spot after Tiger Woods's long reign
Second round leaderboard: -9 F Molinari (Ita) -8 L Westwood (Eng) -7 J Van Zyl (RSA), R Ramsey (Sco), E Els (RSA) -6 L Donald (Eng) -5 R Fisher (Eng)
Selected others:-4 P Harrington (Ire), T Woods (US) -3 M Kaymer (Ger), P Mickelson (US) -2 R McIlroy (NI) level P Casey (Eng) +1Graeme McDowell (NI)
New world number one Lee Westwood finished his second round strongly at the HSBC Champions challenge to sit one shot behind leader Francesco Molinari.
England's Westwood fell three shots behind the Italian at one point on the back nine, but he hit back to post a round of 70 and finish on eight under.
Deposed world number one Tiger Woods is five off the lead after a difficult 72.
Westwood is well placed to retain his ranking, with rivals Martin Kaymer and Phil Mickelson five shots behind him.
The highlight of the 37-year-old's late surge came when he hit a driver on to the par four 16th green to set up a birdie.
The Worksop golfer did not pick up his first birdie until the eighth, and he gave the stroke back at the 11th after hooking his tee shot into the woods.
A decent birdie chance slipped by at the 13th, but Westwood picked up a shot at the next before just missing out with a chipped eagle at the 16th which would have drawn him level with Molinari.
South Africa's Ernie Els hit the round of the day, carding a 65 to leave himself two shots off the lead, along with compatriot Jaco Van Zyl - who recorded five birdies and an eagle on his back nine - and Scotland's Richard Ramsay.
Molinari, one of Westwood's victorious Ryder Cup team-mates, began in ideal fashion with two birdies in his first four holes.
A three at the par four seventh followed and it seemed he was primed to move clear of the field, but a bogey at the ninth curtailed his charge and his back nine was solid rather than spectacular.
England's Luke Donald is alone in sixth, three shots back following a steady 70 that featured three birdies and a bogey.
A frustrated Woods endured a day of mixed fortunes as five bogeys cancelled out five birdies.
That left him in a group of nine
at four under par that also includes Ian Poulter, Padraig Harrington, Phil Mickelson and Australia's Richard Greene, who fired a hole in one at the par three fourth.