Leander Paes and David Rikl sustained their winning momentum to reach the semifinals of the 2.4 million euro ATP Tennis Masters in Hamburg.

Paes and the Czech Republic's Rikl defeated fifth seed Australian duo Wayne Arthurs and Paul Hanley 6-3, 6-2 on Friday to set up a last-four showdown with top seeded American brothers Bob and Mike Bryan.

It was the second upset victory of the week for the unseeded pair who had earlier beaten the third seeded Mahesh
Bhupathi and Max Mirnyi in the second round.

The win must have been sweeter for Paes and Rikl as they had lost to Arthurs and Hanley at Rome last week.

Meanwhile, Prakash Amritraj and Jean Julien Roger faltered at the last hurdle at the $15,000 men's event at Uzbekistan.

Amritraj and Roger upset top seeds Jonathan Murray and Aisam Qureshi 6-4, 3-6, 6-3 in the semifinals before losing the final 5-7 4-6 to Alexey Kodriouk and Orest Tereschuk