Robert Harley's try clinched the win and try-bonus

Robert Harley's late try extended Glasgow's 100 per cent start to the Guinness PRO14 season and sees the Warriors start their European campaign full of confidence.

Flanker Harley crashed over with four minutes remaining following Finn Russell's expert chip to continue the Warriors' fine run and prevent their in-form hosts recording a fourth successive win.

The 76th-minute score also earned the Scottish side a bonus point after Callum Gibbins registered his first two tries for the club and Henry Pyrgos got his name on the scoreboard.

A high-scoring contest was expected at the Free State Stadium and Russell's second-minute penalty put Glasgow ahead, before the hosts roared back to establish a 10-3 lead thanks to Sergeal Petersen's converted try and a penalty from fly-half Ernst Stapelberg.

Flanker Gibbins' first score of the evening, converted by Russell, levelled proceedings but the home side took a seven-point lead into the break after Rosko Specman ran the length of the field to touch down and Stapelberg added the extras.

In an action-packed second period, Glasgow restored parity when Russell converted in the 55th minute after Gibbins had crossed following a fine interception and run from Ruaridh Jackson.

A pair of penalties from Stapelberg swung the advantage back in Cheetahs' favour before Henry's converted try gave Glasgow a slender one-point advantage heading into the final nine minutes.

The Warriors' unbeaten start to the campaign looked in doubt when Stapelberg kicked a 76th-minute penalty to put the South African team back in front but Harley popped up moments later to make it six wins from six for the Conference A leaders.