"Chelsea" and "Inter" - already in the round of 16 © EuroFootball.com

On Tuesday, the fourth round of matches of the UEFA Champions League took place in Groups E-H. Two teams have already secured a spot in the quarterfinals, with just one point needed for two more teams to reach this goal.

In a surprise twist in Group E, Athens' Panathinaikos managed to play to a draw against England's champion Arsenal in London, strengthening their hopes of staying in the league. Eindhoven's PSV remains the leader of the group after narrowly defeating Trondheim's Rosenborg at home.

After a dramatic battle in Group F, there is now a tie between Barcelona and Milan, with Barcelona's Ronaldinho's individual brilliance securing a win against Milan. Both teams are now closer to reaching the quarterfinals, as Celtic celebrated a victory against Shakhtar in the other match.

In Group G, Inter guaranteed their spot in the quarterfinals after a draw with Valencia, while Werder achieved a crushing victory against Anderlecht to progress towards their goal.

London's Chelsea is the only club to have won all four matches, defeating Moscow's CSKA away and securing their place in the next stage. Meanwhile, last year's winner, Porto, has complicated their position after drawing with PSG.

Statistics for the first day of the fourth round:

Group E: - 1-1 - 16' [1-0] Thierry Henry (pen.) - 74' [1-1] Pascal Cygan (own goal) - 1-0 - 10' [1-0] DeMarcus Beasley

Group F: - 2-1 - 17' [0-1] Andriy Shevchenko - 37' [1-1] Samuel Eto'o - 89' [2-1] Ronaldinho - 1-0 - 25' [1-0] Alan Thompson

Group G: - 0-0 - 5-1 - 2' [1-0] Ivan Klasnic - 16' [2-0] Ivan Klasnic - 30' [2-1] Oleg Iachtchouk - 33' [3-1] Miroslav Klose - 79' [4-1] Ivan Klasnic - 90' [5-1] Daniel Jensen

Group H: - [0-1] - 24' [0-1] Arjen Robben - [0-0]

Tournament standings: Group E: 1. PSV 4 3 0 1 4-2 9 2. Arsenal 4 1 3 0 5-4 6 3. Panathinaikos 4 1 2 1 5-5 5 4. Rosenborg 4 0 1 3 3-6 1

Group F: 1. Barcelona 4 3 0 1 8-3 9 2. Milan 4 3 0 1 6-3 9 3. Shakhtar 4 1 0 3 3-5 3 4. Celtic 4 1 0 3 3-9 3

Group G: 1. Inter 4 3 1 0 10-2 10 2. Werder 4 3 0 1 9-5 9 3. Valencia 4 1 1 2 4-7 4 4. Anderlecht 4 0 0 4 3-12 0

Group H: 1. Chelsea 4 4 0 0 9-1 12 2. CSKA 4 1 1 2 2-3 4 3. PSG 4 1 1 2 2-5 4 4. Porto 4 0 2 2 1-5 2