Marcelo Bielsa savoured Leeds' first clean sheet in seven Premier League games after their 2-0 home win against Crystal Palace.
Leeds moved into the top half of the table thanks to goals early in either half from Jack Harrison and Patrick Bamford and did not concede for the first time since their 5-0 win at West Brom at the end of December.
'The fact that we didn't concede any goals was important,' Bielsa said. 'We didn't suffer any chances in the first half and very few in the second.