Jonah Lomu suffered a serious-looking ankle injury as Cardiff Blues eased to a bonus-point victory over the Borders.
Cardiff Blues (13) 46:
Tries: J. Robinson (2), Stcherbina, R. Thomas, Macleod, Lewis
Cons: N. Robinson (3), McLeod (2)
Pens: N. Robsinon (2)
Border Reivers (5) 11:
Try: Ben MacDougall
Pens: MacRae (2)
Lomu was helped off the field after twisting his ankle as he set up Mark Lewis for the home side's sixth try.
The Blues only led 13-5 at half-time as the visitors hit back after Jamie Robinson's converted try with an unconverted score from Ben MacDougall.
But the Blues cut loose after the break as Robinson, Marc Stcherbina, Rhys Thomas and Nick Macleod crossed.
The Borders managed just two penalties from Calum MacRae in the second-half as the Blues eased to their fourth successive Celtic League win.
A home win looked inevitable as the home side started brightly and quickly opened a 6-0 lead with two Nicky Robinson penalties.
But the expected tries failed to materialise until the 32nd minute when Jamie Robinson benefited from a Mike Phillips break to score.
And the home side were certain of a severe lecture from coach Dai Young at half-time after a sweeping left-to-right move created an overlap for MacDougall to cross and bring the Borders back within eight points.
Young's words obviously did the trick as the Blues scored inside the first minute as a set move from a scrum created a huge midfield gap for Jamie Robinson to score under the posts.
Another neat midfield move sent Stcherbina over eight minutes later, and the Blues were clear at 27-8 following Nick Robinson's third conversion.
Substitute hooker Thomas scored from a straight forward catch-and-drive lineout on the hour.
And Macleod then converted his own try after pickig up a loose ball to race clear from the halfway line on 70 minutes.
But some of the gloss was then taken off the fine victory four minutes from time with Lomu's injury.
The New Zealand winger looked set to celebrate his first start since January with a try, but he was denied by a great covering tackle and twisted his ankle as he fell to the ground.
Lomu still managed to get the ball away, though, to substitute Lewis who dived over in the left corner and Macleod ended the scoring with a superb conversion.
Cardiff Blues coach Dai Young:
"Obviously we're happy with the result but the performance was a bit messy on occasions.
"Over the last month to six weeks we've really pulled together and proven a lot of people wrong. But that's not out motivation - we just want to finish the season strongly.
"It's big game for us on Wednesday and I'm sure we'll get a warm welcome down at Rodney Parade."
Cardiff Blues: R. Williams (capt); Czekaj, J. Robinson, Stcherbina, Lomu; N. Robinson, M. Phillips; Yapp, Goodfield, Jenkins, D. Jones, Sidoli, Schubert, M. Williams, A. Powell.
Replacements: Morgan for Stcherbina (72), Macleod for N. Robinson (62), R. Powell for M. Phillips (57), R. Thomas for Goodfield (45), S. Roberts for Jenkins (62), Lewis for M. Williams (65), Sowden-Taylor for A. Powell (11).
Borders: Moffat; Danielli, MacDougall, MacRae, Walker; King, McKearchar; McGee, Scott, Douglas, Dalziel, MacLeod, Brown, Gray, Sititi.
Replacements: Miller for Moffat (69), Weston for McKearchar (71), Thomson for McGee (52), Kay for Scott (71), Stewart for MacLeod (61), Kibble for Gray (52).
Not Used: Cross.
Referee: George Clancy (RU)