Under 23 games at odds 1.75
ATP World Tour, 1st Semi final
In my opinion Novak Djokovic is clear favorite in this match and I expect to see him wining today in straight sets with under 23 total games played.
Novak leads against Del Potro 6-2. In those six wins he lost only one set and it was on clay court.
The last time when Argentinian won was on Olympics but later in this season Novak was better two times (Cincinnati and US Open) and both times it was in straight sets.
On the other side Del Potro was solid in London in previous matches but his yesterday's win over Federer does not mean too much in this SF since clearly Roger Federer is quite below level od Novak as well of level of Andy Murray.