 Later in his career , Federer added the drop shot to his arsenal and can perform a well @-@ disguised one off both wings . He sometimes uses a between @-@ the @-@ legs shot , which is colloquially referred to as a " tweener " or " hotdog " . His most notable use of the tweener was in the semifinals of the 2009 US Open against Novak Djokovic , bringing him triple match point . Federer is one of the top players who employs successfully the " squash shot " , when he gets pushed deep and wide on his forehand wing . Since Stefan Edberg joined his coaching team at the start of the 2014 season , Federer has played a more offensive game , attacking the net more often , and improved his volley shots . In the lead @-@ up to the 2015 US Open , Federer successfully added a new unique shot to his arsenal called SABR ( Sneak Attack by Roger ) , in which he charges his opponent while receiving the serve and hits a return on the run . 
 Later in his career , Federer added the drop shot to his arsenal and can perform a well @-@ disguised one off both wings . He sometimes <a href='uninflect' title='1'><mark>uses</mark></a> a between @-@ the @-@ legs shot , which is colloquially referred to as a " tweener " or " hotdog " . His most notable use of the tweener was in the semifinals of the 2009 US Open against Novak Djokovic , bringing him triple match point . Federer <a href='drop_aux' title='2'><mark>is</mark></a>one of the top players <a href='null_relcl' title='3'><mark>who</mark></a><a href='uninflect' title='4'><mark>employs</mark></a> successfully the " squash shot " , when he <a href='uninflect' title='5'><mark>gets</mark></a> pushed deep and wide on his forehand wing . Since Stefan Edberg joined his coaching team at the start of the 2014 season , Federer <a href='been_done' title='6'><mark>has</mark></a> played a more offensive game , attacking the net more often , and improved his volley shots . In the lead @-@ up to the 2015 US Open , Federer successfully added a new unique shot to his arsenal called SABR ( Sneak Attack by Roger ) , in which he <a href='uninflect' title='7'><mark>charges</mark></a> his opponent while receiving the serve and <a href='uninflect' title='8'><mark>hits</mark></a> a return on the run . 
Later in his career , Federer added the drop shot to his arsenal and can perform a well @-@ disguised one off both wings . He sometimes use a between @-@ da @-@ legs shot , which is colloquially referred to as a " tweener " or " hotdog " . His most notable use of the tweener was in the semifinals of the 2009 US Open against Novak Djokovic , bringin him triple match point . Federer one of the top players employ successfully tda" squash shot " , when he get pushed deep and wide on his forehand wing . Since Stefan Edberg joined his coaching team at the start of thda014 season , Federer done played a more offensive game , attacking the net more often , and improved his volley shots . In the lead @-@ up to the 2015 US Open , Federer successfully added a new unique shot to his arsenal called SABR ( Sneak Attack by Roger ) , in which he charge his opponent while receiving the serve and hit a return on the run .