eugene wrote in
<OtSdnRsUNcs3PPbaRVnyggA@bt.com>

IMHO

It ain't "who".

It's "which" if it introduces a subordinate clause, e.g.
"The football team, which qualified for the Champions League, behaved
appallingly at the Christmas party."

Note the commas round the clause introduced by the "which". It should be
possible to remove the clause bracketed by the commas and still leave the
main idea intact, e.g.
"The football team behaved appallingly at the Christmas party."

It's "that" if it introduces a clause that indicates a restriction applying
only to that team, e.g.
"The football team that wins the most points ends up at the top of the
table."

HTH

I believe that there is a certain amount of dispute about the correct
"restricive relative pronoun" - "which" or "that". I frequently disagree
with Word's grammar.

Personally - and I can't say any more than that - it just feels better to me
this way...

I would say (despite having neither a blue car nor a garage <g>)

   The car [that] I bought yesterday, which is blue, is very fast.

   Of the two cars in my garage, the car that is blue was bought yesterday.

Re your specific caption, my preference would also be "The team that
defeated their rivals..." (assuming that this means "[This is] the team
that...") unless the rest of the caption suggests otherwise - such as "The
football team, which won on Saturday, looking glorious in their new kit..."

So, if English were democratic, you'd be one vote up now :)

But my wife says I don't know grammer like wot she does...

Really depends on the context of the whole passage:
"which" and "that" can often be used correctly. Personal choice and
consistency throughout your text.
"who" can be correct if you are infering "team" as a common noun.
Does this help? ;-)
DeanH