She set a new championship record of 4937 points on the way to victory in Doha.

In the morning session Ennis was the only person to clear 1.90m in the high jump, she won the 60m hurdles and was fifth in the shot put.

Later in the day she claimed a personal best 6.44m in the long jump and clinched the title with a second place finish in the 800m.

Ennis adding this title to the Heptahlon outdoor title she won last summer in Berlin.

Olympic champion Natallia Dobrynska of Ukraine claimed silver.

Ennis said: "It is very special to win here and break the championship record. I had a great year in 2009 so everyone was expecting me to win.

"It feels great to beat the three medallists from Beijing and I know the world record is within reach."

In the final event on day two, Dwain Chambers took the 60m crown with the best time in the world this year.

He clocked 6.48 seconds good enough to beat American Michael Rodgers to gold.

Chambers improving on the silver he won in Valencia two years ago.