Doncaster Rovers 1 Bristol City 0. Paul Heffernan returned to haunt City and put the brakes on their play-off push at the Keepmoat Stadium.

Brian Tinnion's first signing as City manager in 2004, the Irishman failed to make an impact at Ashton Gate and was sold to Doncaster after just one season.

But he proved his worth in this clash between the Championship's form sides, scoring the decisive goal in the fourth minute to bring City's eight-match unbeaten run to an abrupt end.

In the process, Heffernan consigned the visitors to a first league defeat since Burnley claimed the spoils in Bristol on December 20.

More tellingly, he prevented his former club from leapfrogging Sheffield United and moving into the play-off positions.

City will no doubt feel aggrieved by their treatment at the hands of referee Clive Oliver.

The Northumberland official incensed the visitors on two occasions, disallowing a Gavin Williams goal midway through the first half and then turning down appeals for a penalty when Nicky Maynard went down under pressure from Rovers centre-back Matt Mills.

Already without long-term casualties Marvin Elliott and Jamie McCombe, City were also denied the services of target man Dele Adebola, injured during Saturday's 2-0 win over Southampton.

Recently returned from World Cup duty with Trinidad & Tobago, Stern John deputised alongside nine-goal top scorer Nicky Maynard in attack.

If the Robins doubted they were in for anything other than a torrid encounter against opponents who had won six of their last seven outings, they were reminded as early as the fourth minute.

That was all the time Doncaster needed to open up the visitors' defence and forge a precious lead. Martin Woods proved the architect, anticipating Heffernan's clever run and threading a perfectly-weighted pass between centre-backs Louis Carey and Liam Fontaine to provide the Irishman with the simplest of first-time finishes from 12 yards out.

It was only Doncaster's 10th league goal at the Keepmoat Stadium, but it was sufficient to plunge City's eight-match unbeaten run into jeopardy.

Required to summon a response, the Robins forced a corner and Lee Johnson picked out Bradley Orr, whose header flashed just the wrong side of the upright.

Their confidence sky high, Rovers continued to play the more fluent football and another sweeping move offered the fast-raiding Woods a clear sight of goal. Fortunately for the visitors, his thunderous strike from the edge of the box flew over Adriano Basso's cross bar.

City were prepared to meet fire with fire and threatened an equaliser when slick approach play left John with room in which to unleash a shot which fizzed wide of the target.

They came closer still on the half-hour mark, Williams meeting John's downward header with a volley which made the net bulge, only for referee Clive Oliver to adjudge the Trinidadian offside.

Rovers keeper Neil Sullivan made a telling intervention shortly before half-time, falling to his right to somehow keep out a close-range shot from Williams after Johnson and Orr had combined to prise open Doncaster's defence.

As the interval approached, Rovers issued a reminder of their ability to counter quickly, Woods cutting in from the right to test Basso with a rasping shot which the Brazilian had to turn behind.

City boss Gary Johnson made a change at half-time, withdrawing John and introducing teenage striker John Akinde, presumably to provide some ballast to an attack which had hitherto struggled to make an impact.

But the second half began badly for the visitors, Orr and McIndoe being issued with yellow cards in quick succession by referee Oliver. As the game descended into stalemate, clear-cut chances proved hard to engineer.

When one presented itself to Akinde, the substitute aimed his low shot straight at Sullivan, who saved comfortably. Although Rovers shaded possession, they were restricted to a James Coppinger shot which Basso saved at the foot of his left-hand post, and the best opportunities were carved out by the Robins.

Cole Skuse stole forward to send a drive inches over from the edge of the 18 yard box and McIndoe hooked the ball high and wide after finding space beyond the far post. But the clear-cut chance they craved continued to elude them and time eventually ran out.