advantage court noun

(often shortened to ad court) the left side of a tennis court, from which the serve is made and received at odd-numbered points

advantage rule noun

In games, a rule under which an infringement and its penalty are overlooked when this is to the advantage of the non-offending side

have the advantage of

To recognize without being recognized

take advantage of

1. To avail oneself of
2. To make undue use of an advantage over
3. To seduce

take at advantage

1. To use favourable conditions against
2. To take by surprise

to advantage

So that the merits are clearly perceived

turn something to advantage

To use circumstances or a situation to one's benefit