As with anything in life, there are always expectations. However, not all expectations yield the anticipated result.
If tennis players were polled, it's probable that most, if not all, would say their greatest achievement would be winning a Grand Slam singles title. The four Grand Slam tournaments (Australian Open, French Open, Wimbledon and the US Open) are the crowning jewels of tennis.
However, though every player has a goal of achieving that grand title, many may never achieve it.
The slideshow will take a look at the top 25 current and former players who have had the perpetual problem of a Grand Slam singles title slipping from their grasp.
It is important to note that though some of the players on this list may have titles in doubles or mixed doubles, this list is focused on singles titles.
Note: The list is not in a particular order as it is a combination of men and women over the years.