Juan Martin Del Potro is currently ranked 14th on the ATP World Tour.
He has been ranked as high as fourth in his career, but the wrist injury suffered in the months following the Argentine's tremendous win at the 2009 US Open proved to be a massive setback.
He missed the entire 2010 ATP season with the exception of the very early events, and has spent 2011 coming back from the peripheral edges of top tennis.
Yet at this point in his career, the Argentine looks to have a reasonable chance of making it back into the top 10 before season's end.
He is currently playing the ATP Valencia draw, where he is a significant favorite to defeat Dmitry Tursunov in the first round (Source: bet365, 1/7.) Should Del Potro win that match, he would then face Kevin Anderson, a player who is having a good season but one against whom "Delpo" is 4-1 against in sets played.
Jo-Wilfried Tsonga is near Del Potro in the Valencia draw in what promises to be an entertaining third-round match should both players win their first two matches.
With strong results in Valencia this week and in the Paris Masters next week, Del Potro could wend his way back into the top 10. A title in either event should do the trick, especially in Paris, as that event is part of the 1000 series.
Del Potro is still well on the outside looking in for the 2011 ATP World Tour Finals as he is 11th in that race with only the top eight qualifying. However the Argentine is by no means out of contention just yet.
If he can get into the top 10—even if he's outside the top eight—the Argentine would have a slight chance of making it into the event as an alternate.
However, what Del Potro really needs to do to give himself a solid chance to claim a spot at the Finals is barge his way through the Valencia draw and plow his way to the Paris semis.
The Valencia tournament, part of the 500 series, is not loaded with the top talent like ATP Basel—a concurrently running event.
While the number one seed in Valencia is David Ferrer, he's a cut below the likes of Roger Federer, Andy Murray, and Novak Djokovic, three players active in the Basel draw. Valencia is Del Potro's chance to push for the ATP World Tour Finals, something that is not out of reach at this point.
In Del Potro's only other appearance at the World Tour Finals (2009,) he made the championship match before suffering a loss to Nikolay Davydenko.