a close call
1. A narrow escape from or avoidance of a situation, often an unfavorable or dangerous one. It was a close call, but I managed to avoid hitting the deer that ran directly in front of my car.
2. A decision or judgment that is difficult to make due to each possibility being nearly equal in one's consideration. I'm sorry, it really was a close call, but we've decided to go with another candidate for this position.
3. A contest or competition whose winner is not clear due to very close competition or results that are difficult to distinguish. With the two candidates having nearly equal amounts of delegates, this election is going to be a very close call.
a close callor
a close thing
COMMON If you describe an event as a close call or a close thing, you mean that someone very nearly had an accident or disaster, or very nearly suffered a defeat. `That was a close call,' said Bess, as the boat steadied. It was a close thing and, looking back now, I have no doubt that if my friend hadn't acted so promptly, I'd be dead.