I went to play fifa 10 to try this formation (4-3-2-1) and my new own custom tactics for chelsea.
Name of Player , def/att workrate :
Bosingwa , high def/med att.
Carvalho , high def/low att.
John Terry , high def/low att.
Ashley cole , high def/med att.
Essien , high def/low att.
Lampard , high def/high att.(because lampard must help defense and attack.)
Ballack , high def/high att.(because ballack must help defense and attack.)
Joe cole , low def/high att.( joe cole don't need to defense because it's enough that there is a lot defensive like lampard , ballack , essien with 4 defenders , so joe cole can give a ball to drogba to score a lot like playmaker even joe cole scored a lot.
Anelka , low def/high att.(because ........ like the same reason of joe cole.)
Drogba , low def/high att.

Custom Tactics:
Build-Up play:
speed:45 balanced (to get more possession and play very well with organised.)
passing:50 mixed (because if you want to give a ball for a far

no it's wrong way back to the home menu click the first new one.