(CNN) -- India will seek to become the No. 1 team in world cricket's Test rankings with victory in the final match of the series against Sri Lanka starting in Mumbai on Wednesday. 

Mahendra Singh Dhoni's team will seek to overhaul both current incumbents South Africa and their second-placed visitors and clinch a 2-0 victory in the series. 

"It will be an added responsibility. Becoming the number one side is not important, we've got to maintain our performance level," the captain told the official International Cricket Council Web site. 

India will be without opener Gautam Gambhir, who scored centuries in the first two matches but will be absent due to his sister's wedding. 

The inexperienced Murali Vijay is expected to win his second test cap as his replacement. 

Sri Lanka, meanwhile, have dropped spinner Ajantha Mendis as they seek to bounce back from the crushing innings defeat in Kanpur and register a first victory on India soil. 

Seam bowlers Nuwan Kulasekara and Dilhara Fernando are vying to take his place, having missed out as Sri Lanka employed a three-pronged spin attack last time out. 

The tourists will be hoping for a better showing from veteran world record-holder Muttiah Muralitharan, who has taken just five wickets at a cost of 396 runs in the series. 

"Murali is a bowler who has done so much for Sri Lanka and can sometimes have an off day. That's the way cricket goes," captain Kumar Sangakkara told the Cricinfo Web site. 

"That doesn't mean he is any worse a bowler, he is still our best spinner and in my view the best spinner in the world. When you have that quality in the side you have to back that quality and that ability it's no different for tomorrow. 
Why?
India will be without opener Gautam Gambhir, who scored centuries in the first two matches but will be absent due to his sister's wedding.