PARIS (REUTERS) - The absence of Edinson Cavani in Tuesday's 1-1 home draw against Anderlecht suggested that Paris St Germain may need more striker reinforcements if they are to be real contenders in the Champions League.

The Uruguay striker was ruled out with a thigh injury and Zlatan Ibrahimovic was required to salvage a point for the weary Ligue 1 champions, who extended their unbeaten streak in all competitions to 32 games.

"It's a good wake-up call," coach Laurent Blanc told reporters.

Big-spending PSG are likely to qualify for the last 16 and a home draw against Olympiakos Piraeus in three weeks would see them through as Group C winners.

They have 10 points from four games and lead Olympiakos by three points with Benfica in third place on four. Anderlecht are bottom on one point.

But with Cavani in the starting line up on Tuesday, PSG might already be through to the knockout stage.

His absence was felt as Lucas, whose pace can be devastating, still lacks inspiration and Ezequiel Lavezzi has lost his scoring touch.

"He (Cavani) is a player who scored goals. We have players who do that, Zlatan and Edi, but tonight he was not there," said Blanc.

"He brings a lot of depth. He has an interesting role, especially against teams who regroup. All great forwards in Europe score goals. Others must improve in that area," he added in a veiled reference to Lavezzi and Lucas.