DERBY County remain level with Premier League giants Chelsea after a goalless first half in Sunday's FA Cup third round tie.
The Rams managed to keep Jose Mourinho's men at bay in the opening 45 minutes at the iPro Stadium.
Oscar went close from distance on more than one occasion, while Ramires saw his shot deflected on to a post on the stroke of half-time.
Earlier, Samuel Eto'o was sent clear after John Obi Mikel dispossessed Michael Keane but Andre Wisdom and Jake Buxton got back to snuff out the danger.
For Derby, John Eustace shot straight at Mark Schwarzer and Simon Dawkins fired over from 25 yards.
Jamie Ward almost got a sight of goal after intercepting a David Luiz pass but his effort was blocked by Gary Cahill.
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