Lead Tip #5

Do not lead a singleton against a slam if you have an ace. It is highly unlikely your partner has the ace of that suit to give you a ruff.  Instead you are probably help declarer set up that suit by finding a missing honour

Leading an ace against a suit slam could promote a trick for the declarer, but failing to lead the ace may give the declarer a chance to discard that suit and you end up not making the ace at all.  An ace will be right more often than not, but listen to the bidding, as there maybe a clue here.