|Fort Worth Invitational second-round leaderboard|
|-10 Rose (Eng); -9 Grillo (Arg); -7 Kodaira (Jpn), Koepka (US); -6 Van Aswegen (SA)|
|Selected others: -2 Knox (Sco); +3 Laird (Sco)|
England's Justin Rose took a one-shot lead at the Fort Worth Invitational in Texas with a six-under-par 64.
The 37-year-old hit seven birdies to go 10 under par overall and one shot clear of Emiliano Grillo - a 33ft birdie on the fourth being the highlight of the Argentine's round.
"I did a lot of good things today," Rose said.
Rose had started the second round four shots behind American Kevin Na, who carded 62 in the opening round.
However, a three-over 73 on Friday leaves Na at five under par after the second day and sixth overall.
Russell Knox of Scotland shot 71 for the second time but compatriot Martin Laird's three-over-par round on Friday meant he missed the cut.
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