I can't understand "composed" and "where on earth was the marking",plz. ?

do ngoc tien I can't understand "composed" and "where on earth was the marking"

There is not enough text to understand 'composed' or 'marking'. 'On earth' is just an intensifier for 'where'.

The situation:
Goal!!! First blood to Depor! It's horror defending from Celta as Riki is allowed to collect a pass from Gama before turning and firing his effort into the back of the net. Composed from the experienced striker, but where on earth was the marking? What a big goal that could prove to be.
What's the meaning of "composed" ?Is it a past participle,please ?

See definition 4 here: http://www.thefreedictionary.com/compose

I can't understand the grammar of "composed from a experienced striker",who has composed ? "Compose from" is a phrasal verb,isn't it?

do ngoc tien"Compose from" is a phrasal verb,isn't it?

No, it is not. But I still do not understand what is being said in the text.

Composed is being used as an adjective in this sentence. "A composed finish" is a common phrase in football punditry, It means the player calmly scored while under pressure. So I think the announcer is shortening this expression, "[It was a] composed [finish] from the striker."

The situation happened in 10 miniutes in this report:
www.sportsmole.co.uk/football/deportivo-la-coruna/live-commentary/live-commentary-deportivo-la-coruna-3-1-celta-vigo-as-it-happened_74361.html