Germany were expected to ease past Algeria in their World Cup last-16 clash at the Estadio Beira-Rio in Porto Alegre on Monday.
After all, Die Mannschaft are one of the favourites to win the tournament, while Algeria finished second in their group.
However, Joachim Low’s side struggled against their African opponents and failed to score a single goal in normal time.
Algeria pushed Germany hard and themselves came close to scoring a number of times in normal time.
It was only in the second minute of extra time that Germany could actually heave a sigh of relief, as half-time substitute and Chelsea forward Andre Schurrle made the breakthrough.
Mesut Ozil had a rather disappointing game, but it was he who made the match safe for Germany with a close-range effort in the final minute of the extra-time period, although Algeria scored a consolation through Abdelmoumene Djabou just moments later.
The Germany players clearly looked tired after the match and even during the extra-time period.
Arsenal defender Per Mertesacker played the whole 120 minutes for the three-time world champions and took to social networking site Twitter to revel in his side’s victory, but not before admitting that he and his teammates were tired.
Fellow Arsenal star Ozil, who was also on the pitch for the entire contest, was just glad to have made it to the quarter-finals.
It is only going to get more difficult for Germany from now on, as next up for them are fellow European giants France.