Sampdoria came from a goal down to hold table-topping AC Milan to a draw with a strong second-half showing.
Milan had much the better of the first half and Robinho's goal shortly before the interval was due reward for their efforts.
But Samp looked a different team after the interval, pressing either side of Giampaolo Pazzini's equaliser and comfortably withstanding a late flurry from the league leaders.
Kevin-Prince Boateng set the tone for the first period with a long-range shot which was well saved by home keeper Gianluca Curci, who was to play a starring role.
Zlatan Ibrahimovich curled a free-kick high and wide of goal before Curci made an excellent block to keep out Robinho's drive.
Clarence Seedorf was next to test Curci with a 30-yard strike before the hosts finally enjoyed a meaningful attack of their own, Pazzini narrowly failing to connect with Fernando Tissone's cross in front of goal.
Gennaro Gattuso was off target from the edge of the box but Milan were not to be denied and Robinho volleyed home a superb 43rd-minute opener after a neat one-two with Ibrahimovich.
But it did not take long for Samp to threaten after the break and an early counter-attack ended with Pazzini's 25-yard shot flashing wide of the left post.
Tissone also shot wide from distance but they levelled on the hour when Daniele Gastaldello got into the penalty area and set up Pazzini, who beat keeper Christian Abbiati from close range.
Substitute Nicola Pozzi almost put the home team in front eight minutes later as Abbiati made a superb save from his close-range header.
Milan belatedly sparked back into life in the final quarter-hour, but Curci saved Robinho's 25-yard effort and Stefano Lucchini's shot two minutes later.
And when Boateng shot wide from 20 yards with six minutes remaining, the last chance disappeared and the spoils were shared.