The Hammers co-owner is enthused by the number of goals the team have been scoring on their travels.
The Argentine was the star of the show on Saturday as he scored his side’s second goal to give them a 2-1 lead over Crystal Palace - with Slaven Bilic's side going on to prevail 3-1.
He has made an impressive start to life in England, having joined on loan in the summer, and Sullivan says they see him as a goal scoring Luka Modric, stating that he could turn out to be 'very special' in the future.
“I am sure the supporters would have been impressed once again by the performance from Manuel Lanzini against Palace,” he told whufc.com.
“We knew he was a fantastic player. Before he went to the UAE he was regarded as the next Messi in Argentina. We see him more as a Luka Modric who scores goals. He is improving with every game, he could turn out to be very special.”
The co-chairman was also enthusiastic about the number of goals the team are scoring at present, as they continued their impressive away form with victory over the Eagles.
The Hammers have been on fire away from Upton Park this season, beating Arsenal on the opening day before following that success up with victories over Liverpool and Manchester City, and now Crystal Palace.
Their three goals against Alan Pardew’s side took them to 12 in five games, and Sullivan says their goal scoring prowess is what has impressed him greatly.
“I cannot remember seeing the team have such a such a strong start to the season away from home,” he added.
“The great thing is that we are scoring goals and the 3-1 victory over Crystal Palace means we have now scored 12 goals in just five games. We managed to score three at Liverpool and two goals at both Arsenal and Manchester City so it has been a very good start.”