Andy Murray is hoping to have double cause for celebration when he takes on Juan Martin Del Potro in the Rogers Cup final.

The Scot will be looking to claim a 13th career title to go along with his new ranking, having leapfrogged Rafael Nadal to become number two in the world.

Murray was too strong for the Frenchman Jo-Wilfried Tsonga in his semi-final on Saturday, who beat Federer in the last eight.

Tsonga pushed him hard but the Scot always seemed to have something in reserve at the key moments as he claimed a 6-4 7-6 (10/8) victory.

A tight start was broken open when an outrageous netcord helped Murray to break for a 3-1 lead.

Tsonga threatened an immediate response but wasted three break points as Murray held on.

Murray served for the set at 5-3 but was unable to get the job done as Tsonga hit back to frustrate the Scot.

But he then wasted all his hard work by gifting Murray two break point chances with Murray taking the second - and the set - with a winning cross-court forehand.

Tsonga improved on serve in the second set but he continued to make little impression on the Murray delivery.

Last year's US Open runner-up cranked up the pressure in the eighth game but could not convert either of two break point opportunities.

It went to a tie-break with Tsonga claiming a mini-break for a 3-2 lead which he then squandered by netting a drop shot.

Another mini-break gave him a 5-4 lead and the chance to serve out the set. But again Murray hit back and although he had to save a set point, a netted backhand from Tsonga gave Murray his first match point which the Frenchman staved off with a clever drop volley, lob volley combination.

Tsonga wasted another set point before Murray clinched the match with a wonderful return which his opponent could not scoop back over the net.

Murray failed afterwards to hide his delight at rising to number two in the world.

He told Sky Sports Xtra: "To get past Rafa is incredible. Roger and Rafa have shared the one and two ranking for the last five years. They are so consistent and I didn't know if I was ever going to get there.

"Just one more to go now."

Murray was pleased with his victory over Tsonga, whose powerful game makes him a dangerous opponent.

He added: "It's difficult to play him, he dictates everything.

"He hits huge forehands, drop shots and has good feel.

"You just try to stay solid and he came up with a few errors at the end."

Murray will go up against Argentinian Del Potro on Sunday, a player looking for his third title in 2009.

Del Potro beat American Andy Roddick 4-6 6-2 7-5 in the second semi-final.

He responded well to losing the first set, claiming a break in the first game in the second en route to levelling the match.

Roddick had match point on the Del Potro serve at 5-4 in the decider but sent a forehand return wide, and the South American seized the initiative to come back and win the match.