France are on the verge of a shock defeat at the hands of under-strength Germany in their Davis Cup quarter-final.
The Germans, with their top six players all unavailable, took a 2-0 lead on the opening day of their World Group quarter-final in Nancy.
Germany's world number 96 Tobias Kamke beat Julien Benneteau, ranked 50, 7-6 (10-8) 6-3 6-2.
Worse was to follow for the hosts when world number 12 Jo-Wilfried Tsonga lost 5-7 7-6 (7-3) 3-6 7-6 (10-8), 8-6 to the world number 119, Peter Gojowczyk - who is only ranked 10 in Germany.
Tsonga missed a match point in the process and the French must win all three remaining rubbers now to progess.
There was another shock result in Geneva where Kazakhstan's Andrey Golubev beat world number three Stanislas Wawrinka 7-6 (7-5) 6-2 3-6 7-6 (7-5).
Roger Federer saved Wawrinka's blushes after the Australian Open champion was on the wrong end of a huge upset against the world number 64.
Federer stormed to a straight sets 6-4 6-4 6-2 win over Mikhail Kukushkin to level the tie at 1-1.
Golubev's victory, achieved in just under three and a quarter hours, revived bad memories for Wawrinka who lost both his matches - a singles and a doubles rubber - in a 5-0 whitewash victory for Kazakhstan over Switzerland in Astana in 2010.
"I know you're going to consult all the sports psychologists to find out why I lost to Golubev," said Wawrinka. "It came down to a few points that made the difference, which he was able to play freely."
Golubev said: "It was a great match I think for me. The key was to try and be aggressive and not to give him too much time. I think I did good."
Title-holders Czech Republic took a 2-0 lead over Japan in Tokyo.
Despite missing world number five Tomas Berdych, Radek Stepanek and Lukas Rosol claimed battling victories over a weakened Japan team, who are without talisman Kei Nishikori due to injury while Go Soeda has a virus.
Stepanek beat Tatsuma Ito 6-7 (5-7) 7-6 (7-5) 6-1 7-5 in the opening rubber while Rosol then overcame Taro Daniel 6-4 6-4 3-6 4-6 6-2.